8135668539 has 32 divisors (see below), whose sum is σ = 12753094400. Its totient is φ = 5111631360.

The previous prime is 8135668511. The next prime is 8135668579. The reversal of 8135668539 is 9358665318.

It is not a de Polignac number, because 8135668539 - 2⁸ = 8135668283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8135668579) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57924 + ... + 140094.

It is an arithmetic number, because the mean of its divisors is an integer number (398534200).

Almost surely, 2^8135668539 is an apocalyptic number.

8135668539 is a deficient number, since it is larger than the sum of its proper divisors (4617425861).

8135668539 is a wasteful number, since it uses less digits than its factorization.

8135668539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82392 (or 82386 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 8135668539 is about 90197.9408800445. The cubic root of 8135668539 is about 2011.2423974215.

The spelling of 8135668539 in words is "eight billion, one hundred thirty-five million, six hundred sixty-eight thousand, five hundred thirty-nine".