79899502225 has 9 divisors (see below), whose sum is σ = 99077135313. Its totient is φ = 63918471120.

The previous prime is 79899502213. The next prime is 79899502301. The reversal of 79899502225 is 52220599897.

The square root of 79899502225 is 282665.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 37489866129 + 42409636096 = 193623^2 + 205936^2 .

It is not a de Polignac number, because 79899502225 - 2¹⁵ = 79899469457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79899502225.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1385059 + ... + 1441591.

Almost surely, 2^79899502225 is an apocalyptic number.

79899502225 is the 282665-th square number.

79899502225 is the 141333-rd centered octagonal number.

It is an amenable number.

79899502225 is a deficient number, since it is larger than the sum of its proper divisors (19177633088).

79899502225 is an frugal number, since it uses more digits than its factorization.

79899502225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113076 (or 56538 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 79899502225 in words is "seventy-nine billion, eight hundred ninety-nine million, five hundred two thousand, two hundred twenty-five".