155123956904 has 32 divisors (see below), whose sum is σ = 340516008000. Its totient is φ = 64860190080.

The previous prime is 155123956901. The next prime is 155123956919. The reversal of 155123956904 is 409659321551.

It is not an unprimeable number, because it can be changed into a prime (155123956901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33779054 + ... + 33783645.

It is an arithmetic number, because the mean of its divisors is an integer number (10641125250).

Almost surely, 2^155123956904 is an apocalyptic number.

155123956904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155123956904 is an abundant number, since it is smaller than the sum of its proper divisors (185392051096).

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

155123956904 is a wasteful number, since it uses less digits than its factorization.

155123956904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67562753 (or 67562749 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 155123956904 in words is "one hundred fifty-five billion, one hundred twenty-three million, nine hundred fifty-six thousand, nine hundred four".