| Base | Representation |
|---|---|
| bin | 101010011011000010… |
| … | …0000110001001100000 |
| 3 | 22201011000021102102000 |
| 4 | 1110312010012021200 |
| 5 | 2443033421403030 |
| 6 | 105503522124000 |
| 7 | 6403401516600 |
| oct | 1246604061140 |
| 9 | 281130242360 |
| 10 | 91101356640 |
| 11 | 356aa382698 |
| 12 | 157a57b0600 |
| 13 | 878b0595b8 |
| 14 | 45a32b0c00 |
| 15 | 2582dce860 |
| hex | 1536106260 |
91101356640 has 576 divisors, whose sum is σ = 382905169920. Its totient is φ = 20150000640.
The previous prime is 91101356603. The next prime is 91101356641. The reversal of 91101356640 is 4665310119.
91101356640 is a `hidden beast` number, since 9 + 1 + 1 + 0 + 1 + 3 + 5 + 6 + 640 = 666.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 91101356595 and 91101356604.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (91101356641) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6555139 + ... + 6569021.
It is an arithmetic number, because the mean of its divisors is an integer number (664765920).
Almost surely, 291101356640 is an apocalyptic number.
91101356640 is a gapful number since it is divisible by the number (90) 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 91101356640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191452584960).
91101356640 is an abundant number, since it is smaller than the sum of its proper divisors (291803813280).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
91101356640 is a wasteful number, since it uses less digits than its factorization.
91101356640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13952 (or 13931 counting only the distinct ones).
The product of its (nonzero) digits is 19440, while the sum is 36.
Adding to 91101356640 its reverse (4665310119), we get a palindrome (95766666759).
The spelling of 91101356640 in words is "ninety-one billion, one hundred one million, three hundred fifty-six thousand, six hundred forty".
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