79816420325 has 6 divisors (see below), whose sum is σ = 98972361234. Its totient is φ = 63853136240.

The previous prime is 79816420309. The next prime is 79816420331. The reversal of 79816420325 is 52302461897.

It is a Cunningham number, because it is equal to 282518²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 79816420324 = 1^2 + 282518^2 .

It is not a de Polignac number, because 79816420325 - 2⁴ = 79816420309 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 79816420325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1596328382 + ... + 1596328431.

It is an arithmetic number, because the mean of its divisors is an integer number (16495393539).

It is a 1-persistent number, because it is pandigital, but 2⋅79816420325 = 159632840650 is not.

Almost surely, 2^79816420325 is an apocalyptic number.

It is an amenable number.

79816420325 is a deficient number, since it is larger than the sum of its proper divisors (19155940909).

79816420325 is a wasteful number, since it uses less digits than its factorization.

79816420325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192656823 (or 3192656818 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 79816420325 in words is "seventy-nine billion, eight hundred sixteen million, four hundred twenty thousand, three hundred twenty-five".