155921513328 has 160 divisors (see below), whose sum is σ = 511944376320. Its totient is φ = 44509305600.

The previous prime is 155921513323. The next prime is 155921513351. The reversal of 155921513328 is 823315129551.

155921513328 is a `hidden beast` number, since 1 + 5 + 592 + 1 + 5 + 1 + 33 + 28 = 666.

155921513328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155921513323) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3458226 + ... + 3503022.

It is an arithmetic number, because the mean of its divisors is an integer number (3199652352).

Almost surely, 2^155921513328 is an apocalyptic number.

155921513328 is a gapful number since it is divisible by the number (18) 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 155921513328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255972188160).

155921513328 is an abundant number, since it is smaller than the sum of its proper divisors (356022862992).

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

155921513328 is a wasteful number, since it uses less digits than its factorization.

155921513328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45972 (or 45960 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 155921513328 in words is "one hundred fifty-five billion, nine hundred twenty-one million, five hundred thirteen thousand, three hundred twenty-eight".