3640631565516 has 24 divisors (see below), whose sum is σ = 9267062167104. Its totient is φ = 1103221686480.

The previous prime is 3640631565509. The next prime is 3640631565581. The reversal of 3640631565516 is 6155651360463.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13790270950 + ... + 13790271213.

It is an arithmetic number, because the mean of its divisors is an integer number (386127590296).

Almost surely, 2^{3640631565516} is an apocalyptic number.

It is an amenable number.

3640631565516 is an abundant number, since it is smaller than the sum of its proper divisors (5626430601588).

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

3640631565516 is a wasteful number, since it uses less digits than its factorization.

3640631565516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27580542181 (or 27580542179 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 3640631565516 in words is "three trillion, six hundred forty billion, six hundred thirty-one million, five hundred sixty-five thousand, five hundred sixteen".