79384427825 has 54 divisors (see below), whose sum is σ = 106176833154. Its totient is φ = 58674071040.

The previous prime is 79384427821. The next prime is 79384427831. The reversal of 79384427825 is 52872448397.

It can be written as a sum of positive squares in 9 ways, for example, as 687907984 + 78696519841 = 26228^2 + 280529^2 .

It is not a de Polignac number, because 79384427825 - 2² = 79384427821 is a prime.

It is a super-2 number, since 2×79384427825² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79384427821) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 458869439 + ... + 458869611.

It is an arithmetic number, because the mean of its divisors is an integer number (1966237651).

Almost surely, 2^79384427825 is an apocalyptic number.

It is an amenable number.

79384427825 is a deficient number, since it is larger than the sum of its proper divisors (26792405329).

79384427825 is an equidigital number, since it uses as much as digits as its factorization.

79384427825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 274 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 59.

The spelling of 79384427825 in words is "seventy-nine billion, three hundred eighty-four million, four hundred twenty-seven thousand, eight hundred twenty-five".