656610454605 has 32 divisors (see below), whose sum is σ = 1252861691904. Its totient is φ = 287114135616.

The previous prime is 656610454589. The next prime is 656610454607. The reversal of 656610454605 is 506454016656.

It is not a de Polignac number, because 656610454605 - 2⁴ = 656610454589 is a prime.

It is a super-2 number, since 2×656610454605² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656610454607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135941779 + ... + 135946608.

It is an arithmetic number, because the mean of its divisors is an integer number (39151927872).

Almost surely, 2^656610454605 is an apocalyptic number.

It is an amenable number.

656610454605 is a deficient number, since it is larger than the sum of its proper divisors (596251237299).

656610454605 is a wasteful number, since it uses less digits than its factorization.

656610454605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271888425.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 656610454605 in words is "six hundred fifty-six billion, six hundred ten million, four hundred fifty-four thousand, six hundred five".