79785858797 has 4 divisors (see below), whose sum is σ = 79787164320. Its totient is φ = 79784553276.

The previous prime is 79785858791. The next prime is 79785858869.

79785858797 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79785858797 - 2²⁸ = 79517423341 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 (79785858791) 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, 556343 + ... + 684900.

It is an arithmetic number, because the mean of its divisors is an integer number (19946791080).

Almost surely, 2^79785858797 is an apocalyptic number.

It is an amenable number.

79785858797 is a deficient number, since it is larger than the sum of its proper divisors (1305523).

79785858797 is a wasteful number, since it uses less digits than its factorization.

79785858797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305522.

The product of its digits is 2489356800, while the sum is 80.

The spelling of 79785858797 in words is "seventy-nine billion, seven hundred eighty-five million, eight hundred fifty-eight thousand, seven hundred ninety-seven".