3656616648868 has 24 divisors (see below), whose sum is σ = 6431747185080. Its totient is φ = 1818986334720.

The previous prime is 3656616648851. The next prime is 3656616648869. The reversal of 3656616648868 is 8688466166563.

It can be written as a sum of positive squares in 4 ways, for example, as 635722371684 + 3020894277184 = 797322^2 + 1738072^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3656616648868.

It is not an unprimeable number, because it can be changed into a prime (3656616648869) 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, 219871 + ... + 2713222.

It is an arithmetic number, because the mean of its divisors is an integer number (267989466045).

Almost surely, 2^{3656616648868} is an apocalyptic number.

It is an amenable number.

3656616648868 is a deficient number, since it is larger than the sum of its proper divisors (2775130536212).

3656616648868 is a wasteful number, since it uses less digits than its factorization.

3656616648868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934687 (or 2934685 counting only the distinct ones).

The product of its digits is 1433272320, while the sum is 73.

The spelling of 3656616648868 in words is "three trillion, six hundred fifty-six billion, six hundred sixteen million, six hundred forty-eight thousand, eight hundred sixty-eight".