79786857776 has 40 divisors (see below), whose sum is σ = 164244041280. Its totient is φ = 37440546624.

The previous prime is 79786857767. The next prime is 79786857779. The reversal of 79786857776 is 67775868797.

It is a junction number, because it is equal to n+sod(n) for n = 79786857697 and 79786857706.

It is not an unprimeable number, because it can be changed into a prime (79786857779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193906 + ... + 1258961.

It is an arithmetic number, because the mean of its divisors is an integer number (4106101032).

Almost surely, 2^79786857776 is an apocalyptic number.

79786857776 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

79786857776 is an abundant number, since it is smaller than the sum of its proper divisors (84457183504).

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

79786857776 is a wasteful number, since it uses less digits than its factorization.

79786857776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453001 (or 2452995 counting only the distinct ones).

The product of its digits is 1742549760, while the sum is 77.

The spelling of 79786857776 in words is "seventy-nine billion, seven hundred eighty-six million, eight hundred fifty-seven thousand, seven hundred seventy-six".