155015775000 has 1152 divisors, whose sum is σ = 614210688000. Its totient is φ = 36391680000.

The previous prime is 155015774999. The next prime is 155015775011. The reversal of 155015775000 is 577510551.

155015775000 is a `hidden beast` number, since 1 + 550 + 1 + 57 + 7 + 50 + 0 + 0 = 666.

It is a super-3 number, since 3×155015775000³ (a number of 35 digits) contains 333 as substring.

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 polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1962224961 + ... + 1962225039.

It is an arithmetic number, because the mean of its divisors is an integer number (533169000).

Almost surely, 2^155015775000 is an apocalyptic number.

155015775000 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 155015775000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307105344000).

155015775000 is an abundant number, since it is smaller than the sum of its proper divisors (459194913000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155015775000 is an equidigital number, since it uses as much as digits as its factorization.

155015775000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 30625, while the sum is 36.

The spelling of 155015775000 in words is "one hundred fifty-five billion, fifteen million, seven hundred seventy-five thousand".