656610454568 has 64 divisors (see below), whose sum is σ = 1250149904640. Its totient is φ = 323275935744.

The previous prime is 656610454567. The next prime is 656610454589. The reversal of 656610454568 is 865454016656.

It is a super-2 number, since 2×656610454568² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (656610454567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132995396 + ... + 133000332.

It is an arithmetic number, because the mean of its divisors is an integer number (19533592260).

Almost surely, 2^656610454568 is an apocalyptic number.

It is an amenable number.

656610454568 is a deficient number, since it is larger than the sum of its proper divisors (593539450072).

656610454568 is a wasteful number, since it uses less digits than its factorization.

656610454568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874 (or 5870 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 56.

The spelling of 656610454568 in words is "six hundred fifty-six billion, six hundred ten million, four hundred fifty-four thousand, five hundred sixty-eight".