3912791639138 has 8 divisors (see below), whose sum is σ = 6012338372460. Its totient is φ = 1908678848320.

The previous prime is 3912791639129. The next prime is 3912791639147. The reversal of 3912791639138 is 8319361972193.

It is an interprime number because it is at equal distance from previous prime (3912791639129) and next prime (3912791639147).

It can be written as a sum of positive squares in 2 ways, for example, as 3876988566049 + 35803073089 = 1969007^2 + 189217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3912791639138² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

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, 23858485523 + ... + 23858485686.

Almost surely, 2^{3912791639138} is an apocalyptic number.

3912791639138 is a deficient number, since it is larger than the sum of its proper divisors (2099546733322).

3912791639138 is a wasteful number, since it uses less digits than its factorization.

3912791639138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47716971252.

The product of its digits is 13226976, while the sum is 62.

The spelling of 3912791639138 in words is "three trillion, nine hundred twelve billion, seven hundred ninety-one million, six hundred thirty-nine thousand, one hundred thirty-eight".