79769529225 has 81 divisors (see below), whose sum is σ = 150943977639. Its totient is φ = 40263933600.

The previous prime is 79769529179. The next prime is 79769529227. The reversal of 79769529225 is 52292596797.

The square root of 79769529225 is 282435.

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

It can be written as a sum of positive squares in only one way, i.e., 28717030521 + 51052498704 = 169461^2 + 225948^2 .

It is not a de Polignac number, because 79769529225 - 2³⁵ = 45409790857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79769529227) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 80493480 + ... + 80494470.

Almost surely, 2^79769529225 is an apocalyptic number.

79769529225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79769529225 is the 282435-th square number.

79769529225 is the 141218-th centered octagonal number.

It is an amenable number.

79769529225 is a deficient number, since it is larger than the sum of its proper divisors (71174448414).

79769529225 is an equidigital number, since it uses as much as digits as its factorization.

79769529225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036 (or 1018 counting only the distinct ones).

The product of its digits is 42865200, while the sum is 63.

The spelling of 79769529225 in words is "seventy-nine billion, seven hundred sixty-nine million, five hundred twenty-nine thousand, two hundred twenty-five".