3639163680 has 96 divisors (see below), whose sum is σ = 12737088000. Its totient is φ = 970442496.

The previous prime is 3639163679. The next prime is 3639163711. The reversal of 3639163680 is 863619363.

3639163680 is a `hidden beast` number, since 3 + 6 + 3 + 9 + 1 + 636 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×3639163680² = 26487024579662284800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416880 + ... + 425519.

It is an arithmetic number, because the mean of its divisors is an integer number (132678000).

Almost surely, 2^3639163680 is an apocalyptic number.

3639163680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3639163680 is an abundant number, since it is smaller than the sum of its proper divisors (9097924320).

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

3639163680 is a wasteful number, since it uses less digits than its factorization.

3639163680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842423 (or 842409 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 3639163680 is about 60325.4811833275. The cubic root of 3639163680 is about 1538.1565167702.

The spelling of 3639163680 in words is "three billion, six hundred thirty-nine million, one hundred sixty-three thousand, six hundred eighty".