79797181319 has 4 divisors (see below), whose sum is σ = 79903436640. Its totient is φ = 79690926000.

The previous prime is 79797181301. The next prime is 79797181363. The reversal of 79797181319 is 91318179797.

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

It is a cyclic number.

It is not a de Polignac number, because 79797181319 - 2⁸ = 79797181063 is a prime.

It is a super-2 number, since 2×79797181319² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79797111319) 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, 53126534 + ... + 53128035.

It is an arithmetic number, because the mean of its divisors is an integer number (19975859160).

Almost surely, 2^79797181319 is an apocalyptic number.

79797181319 is a deficient number, since it is larger than the sum of its proper divisors (106255321).

79797181319 is a wasteful number, since it uses less digits than its factorization.

79797181319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106255320.

The product of its digits is 6001128, while the sum is 62.

The spelling of 79797181319 in words is "seventy-nine billion, seven hundred ninety-seven million, one hundred eighty-one thousand, three hundred nineteen".