57115712056520 has 128 divisors (see below), whose sum is σ = 141890169385440. Its totient is φ = 20557260226560.

The previous prime is 57115712056499. The next prime is 57115712056547. The reversal of 57115712056520 is 2565021751175.

It can be written as a sum of positive squares in 16 ways, for example, as 116020621924 + 56999691434596 = 340618^2 + 7549814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24311972 + ... + 26557548.

Almost surely, 2^{57115712056520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57115712056520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70945084692720).

57115712056520 is an abundant number, since it is smaller than the sum of its proper divisors (84774457328920).

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

57115712056520 is a wasteful number, since it uses less digits than its factorization.

57115712056520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246835 (or 2246831 counting only the distinct ones).

The product of its (nonzero) digits is 735000, while the sum is 47.

The spelling of 57115712056520 in words is "fifty-seven trillion, one hundred fifteen billion, seven hundred twelve million, fifty-six thousand, five hundred twenty".