57778945057 has 2 divisors, whose sum is σ = 57778945058. Its totient is φ = 57778945056.

The previous prime is 57778945013. The next prime is 57778945061. The reversal of 57778945057 is 75054987775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55665796096 + 2113148961 = 235936^2 + 45969^2 .

It is a cyclic number.

It is not a de Polignac number, because 57778945057 - 2⁷ = 57778944929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57778945057.

It is not a weakly prime, because it can be changed into another prime (57778945067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28889472528 + 28889472529.

It is an arithmetic number, because the mean of its divisors is an integer number (28889472529).

Almost surely, 2^57778945057 is an apocalyptic number.

It is an amenable number.

57778945057 is a deficient number, since it is larger than the sum of its proper divisors (1).

57778945057 is an equidigital number, since it uses as much as digits as its factorization.

57778945057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86436000, while the sum is 64.

The spelling of 57778945057 in words is "fifty-seven billion, seven hundred seventy-eight million, nine hundred forty-five thousand, fifty-seven".