656174468401 has 2 divisors, whose sum is σ = 656174468402. Its totient is φ = 656174468400.

The previous prime is 656174468371. The next prime is 656174468413. The reversal of 656174468401 is 104864471656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349257360400 + 306917108001 = 590980^2 + 554001^2 .

It is a cyclic number.

It is not a de Polignac number, because 656174468401 - 2²¹ = 656172371249 is a prime.

It is not a weakly prime, because it can be changed into another prime (656174468101) 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, 328087234200 + 328087234201.

It is an arithmetic number, because the mean of its divisors is an integer number (328087234201).

Almost surely, 2^656174468401 is an apocalyptic number.

It is an amenable number.

656174468401 is a deficient number, since it is larger than the sum of its proper divisors (1).

656174468401 is an equidigital number, since it uses as much as digits as its factorization.

656174468401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 656174468401 in words is "six hundred fifty-six billion, one hundred seventy-four million, four hundred sixty-eight thousand, four hundred one".