| Base | Representation |
|---|---|
| bin | 1001000010111010011… |
| … | …1101111000111100000 |
| 3 | 112212010011101021221200 |
| 4 | 2100232213233013200 |
| 5 | 10021230123204300 |
| 6 | 155220142321200 |
| 7 | 14140660426200 |
| oct | 2205647570740 |
| 9 | 485104337850 |
| 10 | 155400991200 |
| 11 | 5a9a5898844 |
| 12 | 2614b589200 |
| 13 | 11867508840 |
| 14 | 7742bd4400 |
| 15 | 4097d43200 |
| hex | 242e9ef1e0 |
155400991200 has 1296 divisors, whose sum is σ = 709276853376. Its totient is φ = 31701196800.
The previous prime is 155400991147. The next prime is 155400991253. The reversal of 155400991200 is 2199004551.
155400991200 is a `hidden beast` number, since 1 + 5 + 540 + 0 + 9 + 91 + 20 + 0 = 666.
155400991200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (155400991147) and next prime (155400991253).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 142177854 + ... + 142178946.
Almost surely, 2155400991200 is an apocalyptic number.
155400991200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 155400991200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354638426688).
155400991200 is an abundant number, since it is smaller than the sum of its proper divisors (553875862176).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
155400991200 is a wasteful number, since it uses less digits than its factorization.
155400991200 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1177 (or 1154 counting only the distinct ones).
The product of its (nonzero) digits is 16200, while the sum is 36.
Adding to 155400991200 its reverse (2199004551), we get a palindrome (157599995751).
The spelling of 155400991200 in words is "one hundred fifty-five billion, four hundred million, nine hundred ninety-one thousand, two hundred".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •