56121880392 has 36 divisors (see below), whose sum is σ = 152002203795. Its totient is φ = 18706623408.

The previous prime is 56121880379. The next prime is 56121880427. The reversal of 56121880392 is 29308812165.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

56121880392 is a `hidden beast` number, since 561 + 2 + 1 + 8 + 80 + 3 + 9 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28060940196 + 28060940196 = 167514^2 + 167514^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=167514.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1996209 + ... + 2024127.

Almost surely, 2^56121880392 is an apocalyptic number.

It is an amenable number.

56121880392 is an abundant number, since it is smaller than the sum of its proper divisors (95880323403).

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

56121880392 is an frugal number, since it uses more digits than its factorization.

56121880392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55850 (or 27924 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 56121880392 in words is "fifty-six billion, one hundred twenty-one million, eight hundred eighty thousand, three hundred ninety-two".