79615997825 has 192 divisors, whose sum is σ = 133498122240. Its totient is φ = 45696752640.

The previous prime is 79615997801. The next prime is 79615997827. The reversal of 79615997825 is 52879951697.

It is a happy number.

It is not a de Polignac number, because 79615997825 - 2⁸ = 79615997569 is a prime.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79615997827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 107154404 + ... + 107155146.

It is an arithmetic number, because the mean of its divisors is an integer number (695302720).

Almost surely, 2^79615997825 is an apocalyptic number.

It is an amenable number.

79615997825 is a deficient number, since it is larger than the sum of its proper divisors (53882124415).

79615997825 is a wasteful number, since it uses less digits than its factorization.

79615997825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 891 counting only the distinct ones).

The product of its digits is 85730400, while the sum is 68.

The spelling of 79615997825 in words is "seventy-nine billion, six hundred fifteen million, nine hundred ninety-seven thousand, eight hundred twenty-five".