56991479380 has 24 divisors (see below), whose sum is σ = 130562298720. Its totient is φ = 20724174240.

The previous prime is 56991479359. The next prime is 56991479399. The reversal of 56991479380 is 8397419965.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 129525870 + ... + 129526309.

It is an arithmetic number, because the mean of its divisors is an integer number (5440095780).

Almost surely, 2^56991479380 is an apocalyptic number.

It is an amenable number.

56991479380 is an abundant number, since it is smaller than the sum of its proper divisors (73570819340).

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

56991479380 is a wasteful number, since it uses less digits than its factorization.

56991479380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259052199 (or 259052197 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 56991479380 in words is "fifty-six billion, nine hundred ninety-one million, four hundred seventy-nine thousand, three hundred eighty".