8135668511 has 2 divisors, whose sum is σ = 8135668512. Its totient is φ = 8135668510.

The previous prime is 8135668481. The next prime is 8135668579. The reversal of 8135668511 is 1158665318.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8135668511 - 2¹⁰ = 8135667487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8135668711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4067834255 + 4067834256.

It is an arithmetic number, because the mean of its divisors is an integer number (4067834256).

Almost surely, 2^8135668511 is an apocalyptic number.

8135668511 is a deficient number, since it is larger than the sum of its proper divisors (1).

8135668511 is an equidigital number, since it uses as much as digits as its factorization.

8135668511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 44.

The square root of 8135668511 is about 90197.9407248303. The cubic root of 8135668511 is about 2011.2423951142.

The spelling of 8135668511 in words is "eight billion, one hundred thirty-five million, six hundred sixty-eight thousand, five hundred eleven".