7915939165 has 4 divisors (see below), whose sum is σ = 9499127004. Its totient is φ = 6332751328.

The previous prime is 7915939147. The next prime is 7915939169. The reversal of 7915939165 is 5619395197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5619395197 = 13 ⋅432261169.

It can be written as a sum of positive squares in 2 ways, for example, as 1660236516 + 6255702649 = 40746^2 + 79093^2 .

It is a cyclic number.

It is not a de Polignac number, because 7915939165 - 2²³ = 7907550557 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 (7915939169) 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, 791593912 + ... + 791593921.

It is an arithmetic number, because the mean of its divisors is an integer number (2374781751).

Almost surely, 2^7915939165 is an apocalyptic number.

It is an amenable number.

7915939165 is a deficient number, since it is larger than the sum of its proper divisors (1583187839).

7915939165 is a wasteful number, since it uses less digits than its factorization.

7915939165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583187838.

The product of its digits is 2296350, while the sum is 55.

The square root of 7915939165 is about 88971.5637999018. The cubic root of 7915939165 is about 1992.9702506782.

The spelling of 7915939165 in words is "seven billion, nine hundred fifteen million, nine hundred thirty-nine thousand, one hundred sixty-five".