79516565 has 8 divisors (see below), whose sum is σ = 101032920. Its totient is φ = 59871232.

The previous prime is 79516561. The next prime is 79516627. The reversal of 79516565 is 56561597.

It can be written as a sum of positive squares in 4 ways, for example, as 44209201 + 35307364 = 6649^2 + 5942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79516565 - 2² = 79516561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79516561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467660 + ... + 467829.

It is an arithmetic number, because the mean of its divisors is an integer number (12629115).

Almost surely, 2^79516565 is an apocalyptic number.

It is an amenable number.

79516565 is a deficient number, since it is larger than the sum of its proper divisors (21516355).

79516565 is a wasteful number, since it uses less digits than its factorization.

79516565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935511.

The product of its digits is 283500, while the sum is 44.

The square root of 79516565 is about 8917.2061207533. The cubic root of 79516565 is about 430.0172428636.

The spelling of 79516565 in words is "seventy-nine million, five hundred sixteen thousand, five hundred sixty-five".