3639131646 has 16 divisors (see below), whose sum is σ = 7281964800. Its totient is φ = 1212426968.

The previous prime is 3639131641. The next prime is 3639131647. The reversal of 3639131646 is 6461319363.

It is a junction number, because it is equal to n+sod(n) for n = 3639131598 and 3639131607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639131641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141366 + ... + 165113.

It is an arithmetic number, because the mean of its divisors is an integer number (455122800).

Almost surely, 2^3639131646 is an apocalyptic number.

3639131646 is an abundant number, since it is smaller than the sum of its proper divisors (3642833154).

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

3639131646 is a wasteful number, since it uses less digits than its factorization.

3639131646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308463.

The product of its digits is 209952, while the sum is 42.

The square root of 3639131646 is about 60325.2156730500. The cubic root of 3639131646 is about 1538.1520035125.

The spelling of 3639131646 in words is "three billion, six hundred thirty-nine million, one hundred thirty-one thousand, six hundred forty-six".