656116611656 has 48 divisors (see below), whose sum is σ = 1353380899920. Its totient is φ = 297979624800.

The previous prime is 656116611589. The next prime is 656116611671.

656116611656 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 844115 + ... + 1422941.

It is an arithmetic number, because the mean of its divisors is an integer number (28195435415).

Almost surely, 2^656116611656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656116611656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676690449960).

656116611656 is an abundant number, since it is smaller than the sum of its proper divisors (697264288264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656116611656 is a wasteful number, since it uses less digits than its factorization.

656116611656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580026 (or 580011 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The spelling of 656116611656 in words is "six hundred fifty-six billion, one hundred sixteen million, six hundred eleven thousand, six hundred fifty-six".