56951393520 has 80 divisors (see below), whose sum is σ = 201770657280. Its totient is φ = 13017460992.

The previous prime is 56951393467. The next prime is 56951393531. The reversal of 56951393520 is 2539315965.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×56951393520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 56951393520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16948140 + ... + 16951499.

It is an arithmetic number, because the mean of its divisors is an integer number (2522133216).

Almost surely, 2^56951393520 is an apocalyptic number.

It is an amenable number.

56951393520 is an abundant number, since it is smaller than the sum of its proper divisors (144819263760).

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

56951393520 is a wasteful number, since it uses less digits than its factorization.

56951393520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33899662 (or 33899656 counting only the distinct ones).

The product of its (nonzero) digits is 1093500, while the sum is 48.

The spelling of 56951393520 in words is "fifty-six billion, nine hundred fifty-one million, three hundred ninety-three thousand, five hundred twenty".