38977745713 has 4 divisors (see below), whose sum is σ = 40321805940. Its totient is φ = 37633685488.

The previous prime is 38977745671. The next prime is 38977745749. The reversal of 38977745713 is 31754777983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21169377009 + 17808368704 = 145497^2 + 133448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38977745713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38977745753) 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, 672030070 + ... + 672030127.

It is an arithmetic number, because the mean of its divisors is an integer number (10080451485).

Almost surely, 2^38977745713 is an apocalyptic number.

It is an amenable number.

38977745713 is a deficient number, since it is larger than the sum of its proper divisors (1344060227).

38977745713 is a wasteful number, since it uses less digits than its factorization.

38977745713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344060226.

The product of its digits is 31116960, while the sum is 61.

The spelling of 38977745713 in words is "thirty-eight billion, nine hundred seventy-seven million, seven hundred forty-five thousand, seven hundred thirteen".