639166702996 has 24 divisors (see below), whose sum is σ = 1172315753280. Its totient is φ = 304341768192.

The previous prime is 639166702963. The next prime is 639166703017. The reversal of 639166702996 is 699207661936.

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, 15281901 + ... + 15323668.

It is an arithmetic number, because the mean of its divisors is an integer number (48846489720).

Almost surely, 2^639166702996 is an apocalyptic number.

It is an amenable number.

639166702996 is a deficient number, since it is larger than the sum of its proper divisors (533149050284).

639166702996 is a wasteful number, since it uses less digits than its factorization.

639166702996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30605823 (or 30605821 counting only the distinct ones).

The product of its (nonzero) digits is 39680928, while the sum is 64.

The spelling of 639166702996 in words is "six hundred thirty-nine billion, one hundred sixty-six million, seven hundred two thousand, nine hundred ninety-six".