155590994728 has 32 divisors (see below), whose sum is σ = 314394280200. Its totient is φ = 71760907008.

The previous prime is 155590994719. The next prime is 155590994747. The reversal of 155590994728 is 827499095551.

It can be written as a sum of positive squares in 4 ways, for example, as 112036139524 + 43554855204 = 334718^2 + 208698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155590994728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374851 + ... + 672082.

Almost surely, 2^155590994728 is an apocalyptic number.

It is an amenable number.

155590994728 is an abundant number, since it is smaller than the sum of its proper divisors (158803285472).

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

155590994728 is a wasteful number, since it uses less digits than its factorization.

155590994728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048381 (or 1048377 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 64.

The spelling of 155590994728 in words is "one hundred fifty-five billion, five hundred ninety million, nine hundred ninety-four thousand, seven hundred twenty-eight".