31868421579 has 6 divisors (see below), whose sum is σ = 46032164516. Its totient is φ = 21245614380.

The previous prime is 31868421547. The next prime is 31868421619. The reversal of 31868421579 is 97512486813.

31868421579 is a `hidden beast` number, since 3 + 1 + 8 + 68 + 4 + 2 + 1 + 579 = 666.

It is not a de Polignac number, because 31868421579 - 2⁵ = 31868421547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31868421679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1770467857 + ... + 1770467874.

Almost surely, 2^31868421579 is an apocalyptic number.

31868421579 is a deficient number, since it is larger than the sum of its proper divisors (14163742937).

31868421579 is a wasteful number, since it uses less digits than its factorization.

31868421579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540935737 (or 3540935734 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 31868421579 in words is "thirty-one billion, eight hundred sixty-eight million, four hundred twenty-one thousand, five hundred seventy-nine".