38615915081 has 4 divisors (see below), whose sum is σ = 38619832272. Its totient is φ = 38611997892.

The previous prime is 38615915069. The next prime is 38615915083. The reversal of 38615915081 is 18051951683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38615915081 - 2²⁶ = 38548806217 is a prime.

It is a super-2 number, since 2×38615915081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38615915083) 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 in 3 ways as a sum of consecutive naturals, for example, 1943771 + ... + 1963536.

It is an arithmetic number, because the mean of its divisors is an integer number (9654958068).

Almost surely, 2^38615915081 is an apocalyptic number.

It is an amenable number.

38615915081 is a deficient number, since it is larger than the sum of its proper divisors (3917191).

38615915081 is an equidigital number, since it uses as much as digits as its factorization.

38615915081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917190.

The product of its (nonzero) digits is 259200, while the sum is 47.

The spelling of 38615915081 in words is "thirty-eight billion, six hundred fifteen million, nine hundred fifteen thousand, eighty-one".