79865574774 has 36 divisors (see below), whose sum is σ = 161315205948. Its totient is φ = 26360423040.

The previous prime is 79865574751. The next prime is 79865574823. The reversal of 79865574774 is 47747556897.

It is a junction number, because it is equal to n+sod(n) for n = 79865574699 and 79865574708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 78222384 + ... + 78223404.

It is an arithmetic number, because the mean of its divisors is an integer number (4480977943).

Almost surely, 2^79865574774 is an apocalyptic number.

79865574774 is an abundant number, since it is smaller than the sum of its proper divisors (81449631174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79865574774 is an equidigital number, since it uses as much as digits as its factorization.

79865574774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273 (or 1139 counting only the distinct ones).

The product of its digits is 414892800, while the sum is 69.

The spelling of 79865574774 in words is "seventy-nine billion, eight hundred sixty-five million, five hundred seventy-four thousand, seven hundred seventy-four".