639240575950 has 12 divisors (see below), whose sum is σ = 1188987471360. Its totient is φ = 255696230360.

The previous prime is 639240575933. The next prime is 639240575969. The reversal of 639240575950 is 59575042936.

It is a junction number, because it is equal to n+sod(n) for n = 639240575891 and 639240575900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6392405710 + ... + 6392405809.

It is an arithmetic number, because the mean of its divisors is an integer number (99082289280).

Almost surely, 2^639240575950 is an apocalyptic number.

639240575950 is a deficient number, since it is larger than the sum of its proper divisors (549746895410).

639240575950 is a wasteful number, since it uses less digits than its factorization.

639240575950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784811531 (or 12784811526 counting only the distinct ones).

The product of its (nonzero) digits is 10206000, while the sum is 55.

The spelling of 639240575950 in words is "six hundred thirty-nine billion, two hundred forty million, five hundred seventy-five thousand, nine hundred fifty".