57157765 has 12 divisors (see below), whose sum is σ = 79787916. Its totient is φ = 39193728.

The previous prime is 57157733. The next prime is 57157787. The reversal of 57157765 is 56775175.

It can be written as a sum of positive squares in 2 ways, for example, as 41293476 + 15864289 = 6426^2 + 3983^2 .

It is not a de Polignac number, because 57157765 - 2⁵ = 57157733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116404 + ... + 116893.

It is an arithmetic number, because the mean of its divisors is an integer number (6648993).

Almost surely, 2^57157765 is an apocalyptic number.

It is an amenable number.

57157765 is a deficient number, since it is larger than the sum of its proper divisors (22630151).

57157765 is a wasteful number, since it uses less digits than its factorization.

57157765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233316 (or 233309 counting only the distinct ones).

The product of its digits is 257250, while the sum is 43.

The square root of 57157765 is about 7560.2754579446. The cubic root of 57157765 is about 385.2048496626.

The spelling of 57157765 in words is "fifty-seven million, one hundred fifty-seven thousand, seven hundred sixty-five".