656455554657 has 64 divisors (see below), whose sum is σ = 1128431616000. Its totient is φ = 369413763264.

The previous prime is 656455554617. The next prime is 656455554691. The reversal of 656455554657 is 756455554656.

656455554657 is a `hidden beast` number, since 6 + 564 + 5 + 5 + 5 + 5 + 4 + 65 + 7 = 666.

It is not a de Polignac number, because 656455554657 - 2⁸ = 656455554401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 656455554594 and 656455554603.

It is not an unprimeable number, because it can be changed into a prime (656455554617) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5751648 + ... + 5864670.

It is an arithmetic number, because the mean of its divisors is an integer number (17631744000).

Almost surely, 2^656455554657 is an apocalyptic number.

It is an amenable number.

656455554657 is a deficient number, since it is larger than the sum of its proper divisors (471976061343).

656455554657 is a wasteful number, since it uses less digits than its factorization.

656455554657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113507 (or 113501 counting only the distinct ones).

The product of its digits is 378000000, while the sum is 63.

Subtracting 656455554657 from its reverse (756455554656), we obtain a palindrome (99999999999).

The spelling of 656455554657 in words is "six hundred fifty-six billion, four hundred fifty-five million, five hundred fifty-four thousand, six hundred fifty-seven".