79617087225 has 81 divisors (see below), whose sum is σ = 154523108493. Its totient is φ = 39169016640.

The previous prime is 79617087223. The next prime is 79617087233. The reversal of 79617087225 is 52278071697.

It is a happy number.

The square root of 79617087225 is 282165.

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 20521422009 + 59095665216 = 143253^2 + 243096^2 .

It is not a de Polignac number, because 79617087225 - 2¹ = 79617087223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79617087223) 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, 55021452 + ... + 55022898.

Almost surely, 2^79617087225 is an apocalyptic number.

79617087225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79617087225 is the 282165-th square number.

79617087225 is the 141083-rd centered octagonal number.

It is an amenable number.

79617087225 is a deficient number, since it is larger than the sum of its proper divisors (74906021268).

79617087225 is a wasteful number, since it uses less digits than its factorization.

79617087225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 79617087225 in words is "seventy-nine billion, six hundred seventeen million, eighty-seven thousand, two hundred twenty-five".