639309672883 has 16 divisors (see below), whose sum is σ = 732196350720. Its totient is φ = 546813094176.

The previous prime is 639309672773. The next prime is 639309672917. The reversal of 639309672883 is 388276903936.

It is a cyclic number.

It is not a de Polignac number, because 639309672883 - 2¹⁷ = 639309541811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639309673883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8616060 + ... + 8689942.

It is an arithmetic number, because the mean of its divisors is an integer number (45762271920).

Almost surely, 2^639309672883 is an apocalyptic number.

639309672883 is a deficient number, since it is larger than the sum of its proper divisors (92886677837).

639309672883 is a wasteful number, since it uses less digits than its factorization.

639309672883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76506.

The product of its (nonzero) digits is 70543872, while the sum is 64.

The spelling of 639309672883 in words is "six hundred thirty-nine billion, three hundred nine million, six hundred seventy-two thousand, eight hundred eighty-three".