639535587922 has 48 divisors (see below), whose sum is σ = 1275962163840. Its totient is φ = 234512657280.

The previous prime is 639535587913. The next prime is 639535587979. The reversal of 639535587922 is 229785535936.

It is a super-3 number, since 3×639535587922³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11075022 + ... + 11132617.

It is an arithmetic number, because the mean of its divisors is an integer number (26582545080).

Almost surely, 2^639535587922 is an apocalyptic number.

639535587922 is a deficient number, since it is larger than the sum of its proper divisors (636426575918).

639535587922 is a wasteful number, since it uses less digits than its factorization.

639535587922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22207687 (or 22207676 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 64.

The spelling of 639535587922 in words is "six hundred thirty-nine billion, five hundred thirty-five million, five hundred eighty-seven thousand, nine hundred twenty-two".