8158715879 has 4 divisors (see below), whose sum is σ = 8161126680. Its totient is φ = 8156305080.

The previous prime is 8158715777. The next prime is 8158715921. The reversal of 8158715879 is 9785178518.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9785178518 = 2 ⋅4892589259.

It is a cyclic number.

It is not a de Polignac number, because 8158715879 - 2¹² = 8158711783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8158715479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200317 + ... + 1207094.

It is an arithmetic number, because the mean of its divisors is an integer number (2040281670).

Almost surely, 2^8158715879 is an apocalyptic number.

8158715879 is a deficient number, since it is larger than the sum of its proper divisors (2410801).

8158715879 is a wasteful number, since it uses less digits than its factorization.

8158715879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410800.

The product of its digits is 5644800, while the sum is 59.

The square root of 8158715879 is about 90325.6103162331. The cubic root of 8158715879 is about 2013.1398069330.

The spelling of 8158715879 in words is "eight billion, one hundred fifty-eight million, seven hundred fifteen thousand, eight hundred seventy-nine".