57309165840 has 40 divisors (see below), whose sum is σ = 177658414848. Its totient is φ = 15282444160.

The previous prime is 57309165821. The next prime is 57309165847. The reversal of 57309165840 is 4856190375.

57309165840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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 57309165840.

It is not an unprimeable number, because it can be changed into a prime (57309165847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119393856 + ... + 119394335.

Almost surely, 2^57309165840 is an apocalyptic number.

It is an amenable number.

57309165840 is an abundant number, since it is smaller than the sum of its proper divisors (120349249008).

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

57309165840 is a wasteful number, since it uses less digits than its factorization.

57309165840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238788207 (or 238788201 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 57309165840 in words is "fifty-seven billion, three hundred nine million, one hundred sixty-five thousand, eight hundred forty".