39974868644 has 24 divisors (see below), whose sum is σ = 71648142720. Its totient is φ = 19504818144.

The previous prime is 39974868623. The next prime is 39974868653. The reversal of 39974868644 is 44686847993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84362 + ... + 295070.

It is an arithmetic number, because the mean of its divisors is an integer number (2985339280).

Almost surely, 2^39974868644 is an apocalyptic number.

It is an amenable number.

39974868644 is a deficient number, since it is larger than the sum of its proper divisors (31673274076).

39974868644 is a wasteful number, since it uses less digits than its factorization.

39974868644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211859 (or 211857 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 68.

The spelling of 39974868644 in words is "thirty-nine billion, nine hundred seventy-four million, eight hundred sixty-eight thousand, six hundred forty-four".