8138649805131 has 16 divisors (see below), whose sum is σ = 10867012282368. Its totient is φ = 5418031836000.

The previous prime is 8138649805123. The next prime is 8138649805147. The reversal of 8138649805131 is 1315089468318.

It is not a de Polignac number, because 8138649805131 - 2³ = 8138649805123 is a prime.

It is a super-2 number, since 2×8138649805131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8138649805151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6044605 + ... + 7267361.

It is an arithmetic number, because the mean of its divisors is an integer number (679188267648).

Almost surely, 2^{8138649805131} is an apocalyptic number.

8138649805131 is a deficient number, since it is larger than the sum of its proper divisors (2728362477237).

8138649805131 is a wasteful number, since it uses less digits than its factorization.

8138649805131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225922.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 8138649805131 in words is "eight trillion, one hundred thirty-eight billion, six hundred forty-nine million, eight hundred five thousand, one hundred thirty-one".