56150889921 has 36 divisors (see below), whose sum is σ = 94716081252. Its totient is φ = 31961309184.

The previous prime is 56150889917. The next prime is 56150889931. The reversal of 56150889921 is 12998805165.

56150889921 is a `hidden beast` number, since 56 + 1 + 508 + 89 + 9 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26208048321 + 29942841600 = 161889^2 + 173040^2 .

It is not a de Polignac number, because 56150889921 - 2² = 56150889917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56150889931) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 134380 + ... + 361053.

It is an arithmetic number, because the mean of its divisors is an integer number (2631002257).

Almost surely, 2^56150889921 is an apocalyptic number.

It is an amenable number.

56150889921 is a deficient number, since it is larger than the sum of its proper divisors (38565191331).

56150889921 is a wasteful number, since it uses less digits than its factorization.

56150889921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495710 (or 495700 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 54.

The spelling of 56150889921 in words is "fifty-six billion, one hundred fifty million, eight hundred eighty-nine thousand, nine hundred twenty-one".