57308351971961 has 2 divisors, whose sum is σ = 57308351971962. Its totient is φ = 57308351971960.

The previous prime is 57308351971957. The next prime is 57308351971991. The reversal of 57308351971961 is 16917915380375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52933540495936 + 4374811476025 = 7275544^2 + 2091605^2 .

It is a cyclic number.

It is not a de Polignac number, because 57308351971961 - 2² = 57308351971957 is a prime.

It is not a weakly prime, because it can be changed into another prime (57308351971901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28654175985980 + 28654175985981.

It is an arithmetic number, because the mean of its divisors is an integer number (28654175985981).

Almost surely, 2^{57308351971961} is an apocalyptic number.

It is an amenable number.

57308351971961 is a deficient number, since it is larger than the sum of its proper divisors (1).

57308351971961 is an equidigital number, since it uses as much as digits as its factorization.

57308351971961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42865200, while the sum is 65.

The spelling of 57308351971961 in words is "fifty-seven trillion, three hundred eight billion, three hundred fifty-one million, nine hundred seventy-one thousand, nine hundred sixty-one".