56657474249 has 2 divisors, whose sum is σ = 56657474250. Its totient is φ = 56657474248.

The previous prime is 56657474243. The next prime is 56657474267. The reversal of 56657474249 is 94247475665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55298814649 + 1358659600 = 235157^2 + 36860^2 .

It is a cyclic number.

It is not a de Polignac number, because 56657474249 - 2²⁴ = 56640697033 is a prime.

It is a super-2 number, since 2×56657474249² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56657474243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328737124 + 28328737125.

It is an arithmetic number, because the mean of its divisors is an integer number (28328737125).

Almost surely, 2^56657474249 is an apocalyptic number.

It is an amenable number.

56657474249 is a deficient number, since it is larger than the sum of its proper divisors (1).

56657474249 is an equidigital number, since it uses as much as digits as its factorization.

56657474249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50803200, while the sum is 59.

The spelling of 56657474249 in words is "fifty-six billion, six hundred fifty-seven million, four hundred seventy-four thousand, two hundred forty-nine".