39979311606864 has 60 divisors (see below), whose sum is σ = 127870337920416. Its totient is φ = 11422660458816.

The previous prime is 39979311606859. The next prime is 39979311606893. The reversal of 39979311606864 is 46860611397993.

39979311606864 is a `hidden beast` number, since 3 + 9 + 9 + 7 + 9 + 3 + 1 + 1 + 606 + 8 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 39979311606792 and 39979311606801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19831006734 + ... + 19831008749.

Almost surely, 2^{39979311606864} is an apocalyptic number.

It is an amenable number.

39979311606864 is an abundant number, since it is smaller than the sum of its proper divisors (87891026313552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39979311606864 is a wasteful number, since it uses less digits than its factorization.

39979311606864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39662015504 (or 39662015495 counting only the distinct ones).

The product of its (nonzero) digits is 317447424, while the sum is 72.

The spelling of 39979311606864 in words is "thirty-nine trillion, nine hundred seventy-nine billion, three hundred eleven million, six hundred six thousand, eight hundred sixty-four".