38664390916856 has 16 divisors (see below), whose sum is σ = 73863576988200. Its totient is φ = 18967437053344.

The previous prime is 38664390916849. The next prime is 38664390916859. The reversal of 38664390916856 is 65861909346683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38664390916859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45594800186 + ... + 45594801033.

Almost surely, 2^{38664390916856} is an apocalyptic number.

It is an amenable number.

38664390916856 is a deficient number, since it is larger than the sum of its proper divisors (35199186071344).

38664390916856 is a wasteful number, since it uses less digits than its factorization.

38664390916856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91189601278 (or 91189601274 counting only the distinct ones).

The product of its (nonzero) digits is 1209323520, while the sum is 74.

The spelling of 38664390916856 in words is "thirty-eight trillion, six hundred sixty-four billion, three hundred ninety million, nine hundred sixteen thousand, eight hundred fifty-six".