38964925647 has 12 divisors (see below), whose sum is σ = 56829105424. Its totient is φ = 25724416320.

The previous prime is 38964925631. The next prime is 38964925691. The reversal of 38964925647 is 74652946983.

38964925647 is a `hidden beast` number, since 3 + 8 + 9 + 64 + 9 + 2 + 564 + 7 = 666.

It is not a de Polignac number, because 38964925647 - 2⁴ = 38964925631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38964925607) by changing a digit.

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, 21015754 + ... + 21017607.

Almost surely, 2^38964925647 is an apocalyptic number.

38964925647 is a deficient number, since it is larger than the sum of its proper divisors (17864179777).

38964925647 is a wasteful number, since it uses less digits than its factorization.

38964925647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42033470 (or 42033467 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 38964925647 in words is "thirty-eight billion, nine hundred sixty-four million, nine hundred twenty-five thousand, six hundred forty-seven".