656111216 has 20 divisors (see below), whose sum is σ = 1274827632. Its totient is φ = 327123456.

The previous prime is 656111171. The next prime is 656111297. The reversal of 656111216 is 612111656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52436 + ... + 63731.

Almost surely, 2^656111216 is an apocalyptic number.

It is an amenable number.

656111216 is a deficient number, since it is larger than the sum of its proper divisors (618716416).

656111216 is a wasteful number, since it uses less digits than its factorization.

656111216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116528 (or 116522 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 656111216 is about 25614.6679853556. The cubic root of 656111216 is about 868.9453976161.

The spelling of 656111216 in words is "six hundred fifty-six million, one hundred eleven thousand, two hundred sixteen".