656155556 has 12 divisors (see below), whose sum is σ = 1312311168. Its totient is φ = 281209512.

The previous prime is 656155553. The next prime is 656155571. The reversal of 656155556 is 655551656.

656155556 is an admirable number.

It is a super-2 number, since 2×656155556² = 861080227339338272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (656155553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11717036 + ... + 11717091.

It is an arithmetic number, because the mean of its divisors is an integer number (109359264).

Almost surely, 2^656155556 is an apocalyptic number.

It is an amenable number.

656155556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656155556 is a wasteful number, since it uses less digits than its factorization.

656155556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23434138 (or 23434136 counting only the distinct ones).

The product of its digits is 675000, while the sum is 44.

The square root of 656155556 is about 25615.5334904429. The cubic root of 656155556 is about 868.9649716203.

The spelling of 656155556 in words is "six hundred fifty-six million, one hundred fifty-five thousand, five hundred fifty-six".