57500642625721 has 2 divisors, whose sum is σ = 57500642625722. Its totient is φ = 57500642625720.

The previous prime is 57500642625697. The next prime is 57500642625817. The reversal of 57500642625721 is 12752624600575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42194833020025 + 15305809605696 = 6495755^2 + 3912264^2 .

It is a cyclic number.

It is not a de Polignac number, because 57500642625721 - 2⁵ = 57500642625689 is a prime.

It is not a weakly prime, because it can be changed into another prime (57500642625121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28750321312860 + 28750321312861.

It is an arithmetic number, because the mean of its divisors is an integer number (28750321312861).

Almost surely, 2^{57500642625721} is an apocalyptic number.

It is an amenable number.

57500642625721 is a deficient number, since it is larger than the sum of its proper divisors (1).

57500642625721 is an equidigital number, since it uses as much as digits as its factorization.

57500642625721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 57500642625721 in words is "fifty-seven trillion, five hundred billion, six hundred forty-two million, six hundred twenty-five thousand, seven hundred twenty-one".