79840747683225 has 81 divisors (see below), whose sum is σ = 144767515134333. Its totient is φ = 42062837581440.

The previous prime is 79840747683199. The next prime is 79840747683289. The reversal of 79840747683225 is 52238674704897.

The square root of 79840747683225 is 8935365.

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

79840747683225 is a `hidden beast` number, since 7 + 98 + 40 + 7 + 476 + 8 + 3 + 2 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11154511186569 + 68686236496656 = 3339837^2 + 8287716^2 .

It is not a de Polignac number, because 79840747683225 - 2⁷ = 79840747683097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 11124525837 + ... + 11124533013.

Almost surely, 2^{79840747683225} is an apocalyptic number.

79840747683225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79840747683225 is the 8935365-th square number.

79840747683225 is the 4467683-rd centered octagonal number.

It is an amenable number.

79840747683225 is a deficient number, since it is larger than the sum of its proper divisors (64926767451108).

79840747683225 is an frugal number, since it uses more digits than its factorization.

79840747683225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14536 (or 7268 counting only the distinct ones).

The product of its (nonzero) digits is 1137991680, while the sum is 72.

The spelling of 79840747683225 in words is "seventy-nine trillion, eight hundred forty billion, seven hundred forty-seven million, six hundred eighty-three thousand, two hundred twenty-five".