3639729648 has 40 divisors (see below), whose sum is σ = 9955733328. Its totient is φ = 1141875712.

The previous prime is 3639729619. The next prime is 3639729659. The reversal of 3639729648 is 8469279363.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2229411 + ... + 2231042.

Almost surely, 2^3639729648 is an apocalyptic number.

It is an amenable number.

3639729648 is an abundant number, since it is smaller than the sum of its proper divisors (6316003680).

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

3639729648 is a wasteful number, since it uses less digits than its factorization.

3639729648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460481 (or 4460475 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 57.

The square root of 3639729648 is about 60330.1719540066. The cubic root of 3639729648 is about 1538.2362514124.

The spelling of 3639729648 in words is "three billion, six hundred thirty-nine million, seven hundred twenty-nine thousand, six hundred forty-eight".