79887552769 has 8 divisors (see below), whose sum is σ = 80686487592. Its totient is φ = 79088774400.

The previous prime is 79887552763. The next prime is 79887552799. The reversal of 79887552769 is 96725578897.

It can be written as a sum of positive squares in 4 ways, for example, as 29537578225 + 50349974544 = 171865^2 + 224388^2 .

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 79887552769 - 2²⁵ = 79853998337 is a prime.

It is a super-2 number, since 2×79887552769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79887552763) 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, 1174167 + ... + 1240339.

It is an arithmetic number, because the mean of its divisors is an integer number (10085810949).

Almost surely, 2^79887552769 is an apocalyptic number.

It is an amenable number.

79887552769 is a deficient number, since it is larger than the sum of its proper divisors (798934823).

79887552769 is a wasteful number, since it uses less digits than its factorization.

79887552769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78227.

The product of its digits is 533433600, while the sum is 73.

The spelling of 79887552769 in words is "seventy-nine billion, eight hundred eighty-seven million, five hundred fifty-two thousand, seven hundred sixty-nine".