79185458197 has 4 divisors (see below), whose sum is σ = 80679523500. Its totient is φ = 77691392896.

The previous prime is 79185458173. The next prime is 79185458239.

79185458197 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28394272036 + 50791186161 = 168506^2 + 225369^2 .

It is a cyclic number.

It is not a de Polignac number, because 79185458197 - 2²⁷ = 79051240469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79185458147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747032572 + ... + 747032677.

It is an arithmetic number, because the mean of its divisors is an integer number (20169880875).

Almost surely, 2^79185458197 is an apocalyptic number.

It is an amenable number.

79185458197 is a deficient number, since it is larger than the sum of its proper divisors (1494065303).

79185458197 is a wasteful number, since it uses less digits than its factorization.

79185458197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494065302.

The product of its digits is 25401600, while the sum is 64.

The spelling of 79185458197 in words is "seventy-nine billion, one hundred eighty-five million, four hundred fifty-eight thousand, one hundred ninety-seven".