57386707920 has 120 divisors (see below), whose sum is σ = 193523962632. Its totient is φ = 15239577600.

The previous prime is 57386707871. The next prime is 57386707933. The reversal of 57386707920 is 2970768375.

57386707920 is a `hidden beast` number, since 573 + 8 + 67 + 0 + 7 + 9 + 2 + 0 = 666.

57386707920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1058331024 + 56328376896 = 32532^2 + 237336^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8160 + ... + 338880.

Almost surely, 2^57386707920 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 57386707920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96761981316).

57386707920 is an abundant number, since it is smaller than the sum of its proper divisors (136137254712).

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

57386707920 is a wasteful number, since it uses less digits than its factorization.

57386707920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330981 (or 330972 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 57386707920 in words is "fifty-seven billion, three hundred eighty-six million, seven hundred seven thousand, nine hundred twenty".