3656631656 has 8 divisors (see below), whose sum is σ = 6856184370. Its totient is φ = 1828315824.

The previous prime is 3656631653. The next prime is 3656631679. The reversal of 3656631656 is 6561366563.

It can be written as a sum of positive squares in only one way, i.e., 2272047556 + 1384584100 = 47666^2 + 37210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3656631656² = 26741910135322604672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3656631656.

It is not an unprimeable number, because it can be changed into a prime (3656631653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228539471 + ... + 228539486.

Almost surely, 2^3656631656 is an apocalyptic number.

It is an amenable number.

3656631656 is a deficient number, since it is larger than the sum of its proper divisors (3199552714).

3656631656 is a wasteful number, since it uses less digits than its factorization.

3656631656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457078963 (or 457078959 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 47.

The square root of 3656631656 is about 60470.0889365974. The cubic root of 3656631656 is about 1540.6136386261.

The spelling of 3656631656 in words is "three billion, six hundred fifty-six million, six hundred thirty-one thousand, six hundred fifty-six".