656442054641625 has 32 divisors (see below), whose sum is σ = 1248365233060608. Its totient is φ = 300087796406400.

The previous prime is 656442054641551. The next prime is 656442054641777. The reversal of 656442054641625 is 526146450244656.

It is not a de Polignac number, because 656442054641625 - 2¹⁴ = 656442054625241 is a prime.

It is a super-2 number, since 2×656442054641625² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125036579212 + ... + 125036584461.

It is an arithmetic number, because the mean of its divisors is an integer number (39011413533144).

Almost surely, 2^{656442054641625} is an apocalyptic number.

It is an amenable number.

656442054641625 is a deficient number, since it is larger than the sum of its proper divisors (591923178418983).

656442054641625 is a wasteful number, since it uses less digits than its factorization.

656442054641625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250073163698 (or 250073163688 counting only the distinct ones).

The product of its (nonzero) digits is 165888000, while the sum is 60.

The spelling of 656442054641625 in words is "six hundred fifty-six trillion, four hundred forty-two billion, fifty-four million, six hundred forty-one thousand, six hundred twenty-five".