3639140722944 has 216 divisors, whose sum is σ = 11204498323200. Its totient is φ = 1133435842560.

The previous prime is 3639140722927. The next prime is 3639140722957. The reversal of 3639140722944 is 4492270419363.

3639140722944 is a `hidden beast` number, since 3 + 6 + 3 + 9 + 1 + 407 + 229 + 4 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1192827 + ... + 2949765.

Almost surely, 2^{3639140722944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3639140722944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5602249161600).

3639140722944 is an abundant number, since it is smaller than the sum of its proper divisors (7565357600256).

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

3639140722944 is a wasteful number, since it uses less digits than its factorization.

3639140722944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757021 (or 1757004 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 3639140722944 in words is "three trillion, six hundred thirty-nine billion, one hundred forty million, seven hundred twenty-two thousand, nine hundred forty-four".