639486669676 has 24 divisors (see below), whose sum is σ = 1124694035696. Its totient is φ = 318149130240.

The previous prime is 639486669649. The next prime is 639486669683. The reversal of 639486669676 is 676966684936.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257296 + ... + 1159816.

Almost surely, 2^639486669676 is an apocalyptic number.

It is an amenable number.

639486669676 is a deficient number, since it is larger than the sum of its proper divisors (485207366020).

639486669676 is a wasteful number, since it uses less digits than its factorization.

639486669676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903409 (or 903407 counting only the distinct ones).

The product of its digits is 2539579392, while the sum is 76.

The spelling of 639486669676 in words is "six hundred thirty-nine billion, four hundred eighty-six million, six hundred sixty-nine thousand, six hundred seventy-six".