38561520317 has 2 divisors, whose sum is σ = 38561520318. Its totient is φ = 38561520316.

The previous prime is 38561520311. The next prime is 38561520337. The reversal of 38561520317 is 71302516583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37988348836 + 573171481 = 194906^2 + 23941^2 .

It is a cyclic number.

It is not a de Polignac number, because 38561520317 - 2³² = 34266553021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38561520311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19280760158 + 19280760159.

It is an arithmetic number, because the mean of its divisors is an integer number (19280760159).

Almost surely, 2^38561520317 is an apocalyptic number.

It is an amenable number.

38561520317 is a deficient number, since it is larger than the sum of its proper divisors (1).

38561520317 is an equidigital number, since it uses as much as digits as its factorization.

38561520317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 38561520317 in words is "thirty-eight billion, five hundred sixty-one million, five hundred twenty thousand, three hundred seventeen".