639566789116 has 12 divisors (see below), whose sum is σ = 1134573962032. Its totient is φ = 315402799968.

The previous prime is 639566789101. The next prime is 639566789129. The reversal of 639566789116 is 611987665936.

It is a super-2 number, since 2×639566789116² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095148320 + ... + 1095148903.

Almost surely, 2^639566789116 is an apocalyptic number.

It is an amenable number.

639566789116 is a deficient number, since it is larger than the sum of its proper divisors (495007172916).

639566789116 is a wasteful number, since it uses less digits than its factorization.

639566789116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190297300 (or 2190297298 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 67.

The spelling of 639566789116 in words is "six hundred thirty-nine billion, five hundred sixty-six million, seven hundred eighty-nine thousand, one hundred sixteen".