656091745497 has 48 divisors (see below), whose sum is σ = 987590572800. Its totient is φ = 419204419200.

The previous prime is 656091745493. The next prime is 656091745499. The reversal of 656091745497 is 794547190656.

656091745497 is a `hidden beast` number, since 6 + 5 + 6 + 0 + 91 + 7 + 454 + 97 = 666.

It is not a de Polignac number, because 656091745497 - 2² = 656091745493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656091745493) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60805779 + ... + 60816567.

It is an arithmetic number, because the mean of its divisors is an integer number (20574803600).

Almost surely, 2^656091745497 is an apocalyptic number.

It is an amenable number.

656091745497 is a deficient number, since it is larger than the sum of its proper divisors (331498827303).

656091745497 is a wasteful number, since it uses less digits than its factorization.

656091745497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12518 (or 12515 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 656091745497 in words is "six hundred fifty-six billion, ninety-one million, seven hundred forty-five thousand, four hundred ninety-seven".