38956772917 has 2 divisors, whose sum is σ = 38956772918. Its totient is φ = 38956772916.

The previous prime is 38956772893. The next prime is 38956772947. The reversal of 38956772917 is 71927765983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28248869476 + 10707903441 = 168074^2 + 103479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38956772917 is a prime.

It is a super-2 number, since 2×38956772917² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38956772947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19478386458 + 19478386459.

It is an arithmetic number, because the mean of its divisors is an integer number (19478386459).

Almost surely, 2^38956772917 is an apocalyptic number.

It is an amenable number.

38956772917 is a deficient number, since it is larger than the sum of its proper divisors (1).

38956772917 is an equidigital number, since it uses as much as digits as its factorization.

38956772917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40007520, while the sum is 64.

The spelling of 38956772917 in words is "thirty-eight billion, nine hundred fifty-six million, seven hundred seventy-two thousand, nine hundred seventeen".