8158779765 has 24 divisors (see below), whose sum is σ = 14756751360. Its totient is φ = 4162159584.

The previous prime is 8158779749. The next prime is 8158779767. The reversal of 8158779765 is 5679778518.

It is not a de Polignac number, because 8158779765 - 2⁴ = 8158779749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8158779767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3940405 + ... + 3942474.

It is an arithmetic number, because the mean of its divisors is an integer number (614864640).

Almost surely, 2^8158779765 is an apocalyptic number.

It is an amenable number.

8158779765 is a deficient number, since it is larger than the sum of its proper divisors (6597971595).

8158779765 is a wasteful number, since it uses less digits than its factorization.

8158779765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7882913 (or 7882910 counting only the distinct ones).

The product of its digits is 29635200, while the sum is 63.

The square root of 8158779765 is about 90325.9639583215. The cubic root of 8158779765 is about 2013.1450614818.

The spelling of 8158779765 in words is "eight billion, one hundred fifty-eight million, seven hundred seventy-nine thousand, seven hundred sixty-five".