3111566656 has 56 divisors (see below), whose sum is σ = 6773326560. Its totient is φ = 1406476800.

The previous prime is 3111566641. The next prime is 3111566657. The reversal of 3111566656 is 6566651113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111566657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115215 + ... + 139633.

It is an arithmetic number, because the mean of its divisors is an integer number (120952260).

Almost surely, 2^3111566656 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 3111566656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3386663280).

3111566656 is an abundant number, since it is smaller than the sum of its proper divisors (3661759904).

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

3111566656 is a wasteful number, since it uses less digits than its factorization.

3111566656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24623 (or 24613 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 3111566656 is about 55781.4185549274. The cubic root of 3111566656 is about 1459.9109622314.

The spelling of 3111566656 in words is "three billion, one hundred eleven million, five hundred sixty-six thousand, six hundred fifty-six".