38725646507 has 2 divisors, whose sum is σ = 38725646508. Its totient is φ = 38725646506.

The previous prime is 38725646429. The next prime is 38725646521. The reversal of 38725646507 is 70564652783.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38725646507 - 2²⁰ = 38724597931 is a prime.

It is not a weakly prime, because it can be changed into another prime (38725646527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19362823253 + 19362823254.

It is an arithmetic number, because the mean of its divisors is an integer number (19362823254).

Almost surely, 2^38725646507 is an apocalyptic number.

38725646507 is a deficient number, since it is larger than the sum of its proper divisors (1).

38725646507 is an equidigital number, since it uses as much as digits as its factorization.

38725646507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 38725646507 in words is "thirty-eight billion, seven hundred twenty-five million, six hundred forty-six thousand, five hundred seven".