155439308928 has 64 divisors (see below), whose sum is σ = 412928003520. Its totient is φ = 51807790080.

The previous prime is 155439308909. The next prime is 155439308939. The reversal of 155439308928 is 829803934551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×155439308928² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6000901 + ... + 6026747.

It is an arithmetic number, because the mean of its divisors is an integer number (6452000055).

Almost surely, 2^155439308928 is an apocalyptic number.

It is an amenable number.

155439308928 is an abundant number, since it is smaller than the sum of its proper divisors (257488694592).

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

155439308928 is a wasteful number, since it uses less digits than its factorization.

155439308928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41525 (or 41513 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 155439308928 in words is "one hundred fifty-five billion, four hundred thirty-nine million, three hundred eight thousand, nine hundred twenty-eight".