156564445957 has 2 divisors, whose sum is σ = 156564445958. Its totient is φ = 156564445956.

The previous prime is 156564445937. The next prime is 156564445987. The reversal of 156564445957 is 759544465651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91764161476 + 64800284481 = 302926^2 + 254559^2 .

It is a cyclic number.

It is not a de Polignac number, because 156564445957 - 2¹⁵ = 156564413189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156564445895 and 156564445904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156564445927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78282222978 + 78282222979.

It is an arithmetic number, because the mean of its divisors is an integer number (78282222979).

Almost surely, 2^156564445957 is an apocalyptic number.

It is an amenable number.

156564445957 is a deficient number, since it is larger than the sum of its proper divisors (1).

156564445957 is an equidigital number, since it uses as much as digits as its factorization.

156564445957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720000, while the sum is 61.

The spelling of 156564445957 in words is "one hundred fifty-six billion, five hundred sixty-four million, four hundred forty-five thousand, nine hundred fifty-seven".