57404256457 has 2 divisors, whose sum is σ = 57404256458. Its totient is φ = 57404256456.

The previous prime is 57404256443. The next prime is 57404256493. The reversal of 57404256457 is 75465240475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49971919936 + 7432336521 = 223544^2 + 86211^2 .

It is a cyclic number.

It is not a de Polignac number, because 57404256457 - 2²⁷ = 57270038729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57404256457.

It is not a weakly prime, because it can be changed into another prime (57404256257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28702128228 + 28702128229.

It is an arithmetic number, because the mean of its divisors is an integer number (28702128229).

Almost surely, 2^57404256457 is an apocalyptic number.

It is an amenable number.

57404256457 is a deficient number, since it is larger than the sum of its proper divisors (1).

57404256457 is an equidigital number, since it uses as much as digits as its factorization.

57404256457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704000, while the sum is 49.

The spelling of 57404256457 in words is "fifty-seven billion, four hundred four million, two hundred fifty-six thousand, four hundred fifty-seven".