3649566931816 has 16 divisors (see below), whose sum is σ = 7369317843300. Its totient is φ = 1684415506944.

The previous prime is 3649566931793. The next prime is 3649566931817. The reversal of 3649566931816 is 6181396659463.

It can be written as a sum of positive squares in 2 ways, for example, as 3312203442916 + 337363488900 = 1819946^2 + 580830^2 .

It is not an unprimeable number, because it can be changed into a prime (3649566931817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17545994761 + ... + 17545994968.

Almost surely, 2^{3649566931816} is an apocalyptic number.

It is an amenable number.

3649566931816 is an abundant number, since it is smaller than the sum of its proper divisors (3719750911484).

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

3649566931816 is a wasteful number, since it uses less digits than its factorization.

3649566931816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35091989748 (or 35091989744 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 67.

The spelling of 3649566931816 in words is "three trillion, six hundred forty-nine billion, five hundred sixty-six million, nine hundred thirty-one thousand, eight hundred sixteen".