3138978951386 has 32 divisors (see below), whose sum is σ = 4960132320000. Its totient is φ = 1485730382400.

The previous prime is 3138978951323. The next prime is 3138978951397. The reversal of 3138978951386 is 6831598798313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344824511 + ... + 344833613.

It is an arithmetic number, because the mean of its divisors is an integer number (155004135000).

Almost surely, 2^{3138978951386} is an apocalyptic number.

3138978951386 is a deficient number, since it is larger than the sum of its proper divisors (1821153368614).

3138978951386 is a wasteful number, since it uses less digits than its factorization.

3138978951386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15174.

The product of its digits is 235146240, while the sum is 71.

The spelling of 3138978951386 in words is "three trillion, one hundred thirty-eight billion, nine hundred seventy-eight million, nine hundred fifty-one thousand, three hundred eighty-six".