38156031517 has 2 divisors, whose sum is σ = 38156031518. Its totient is φ = 38156031516.

The previous prime is 38156031461. The next prime is 38156031521. The reversal of 38156031517 is 71513065183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25673332441 + 12482699076 = 160229^2 + 111726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38156031517 is a prime.

It is a super-2 number, since 2×38156031517² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38156031517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38156031547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19078015758 + 19078015759.

It is an arithmetic number, because the mean of its divisors is an integer number (19078015759).

Almost surely, 2^38156031517 is an apocalyptic number.

It is an amenable number.

38156031517 is a deficient number, since it is larger than the sum of its proper divisors (1).

38156031517 is an equidigital number, since it uses as much as digits as its factorization.

38156031517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 38156031517 in words is "thirty-eight billion, one hundred fifty-six million, thirty-one thousand, five hundred seventeen".