3638467294820 has 12 divisors (see below), whose sum is σ = 7640781319164. Its totient is φ = 1455386917920.

The previous prime is 3638467294817. The next prime is 3638467294837. The reversal of 3638467294820 is 284927648363.

It can be written as a sum of positive squares in 2 ways, for example, as 759045197824 + 2879422096996 = 871232^2 + 1696886^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90961682351 + ... + 90961682390.

It is an arithmetic number, because the mean of its divisors is an integer number (636731776597).

Almost surely, 2^{3638467294820} is an apocalyptic number.

It is an amenable number.

3638467294820 is an abundant number, since it is smaller than the sum of its proper divisors (4002314024344).

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

3638467294820 is a wasteful number, since it uses less digits than its factorization.

3638467294820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181923364750 (or 181923364748 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 62.

The spelling of 3638467294820 in words is "three trillion, six hundred thirty-eight billion, four hundred sixty-seven million, two hundred ninety-four thousand, eight hundred twenty".