39664840564 has 12 divisors (see below), whose sum is σ = 69703905600. Its totient is φ = 19749438968.

The previous prime is 39664840549. The next prime is 39664840573. The reversal of 39664840564 is 46504846693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20744254 + ... + 20746165.

It is an arithmetic number, because the mean of its divisors is an integer number (5808658800).

Almost surely, 2^39664840564 is an apocalyptic number.

It is an amenable number.

39664840564 is a deficient number, since it is larger than the sum of its proper divisors (30039065036).

39664840564 is a wasteful number, since it uses less digits than its factorization.

39664840564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41490662 (or 41490660 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 39664840564 in words is "thirty-nine billion, six hundred sixty-four million, eight hundred forty thousand, five hundred sixty-four".