3956651656 has 32 divisors (see below), whose sum is σ = 8078472000. Its totient is φ = 1809573696.

The previous prime is 3956651651. The next prime is 3956651681. The reversal of 3956651656 is 6561566593.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3956651651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444396 + ... + 453211.

It is an arithmetic number, because the mean of its divisors is an integer number (252452250).

Almost surely, 2^3956651656 is an apocalyptic number.

It is an amenable number.

3956651656 is an abundant number, since it is smaller than the sum of its proper divisors (4121820344).

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

3956651656 is a wasteful number, since it uses less digits than its factorization.

3956651656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897661 (or 897657 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 52.

The square root of 3956651656 is about 62901.9209245632. The cubic root of 3956651656 is about 1581.6459448597.

The spelling of 3956651656 in words is "three billion, nine hundred fifty-six million, six hundred fifty-one thousand, six hundred fifty-six".