79068940864 has 21 divisors (see below), whose sum is σ = 156906893577. Its totient is φ = 39533345664.

The previous prime is 79068940861. The next prime is 79068940883. The reversal of 79068940864 is 46804986097.

The square root of 79068940864 is 281192.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 61897459264 + 17171481600 = 248792^2 + 131040^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79068940861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2231962 + ... + 2267110.

It is an arithmetic number, because the mean of its divisors is an integer number (7471756837).

Almost surely, 2^79068940864 is an apocalyptic number.

79068940864 is the 281192-nd square number.

It is an amenable number.

79068940864 is a deficient number, since it is larger than the sum of its proper divisors (77837952713).

79068940864 is an frugal number, since it uses more digits than its factorization.

79068940864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70310 (or 35151 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 79068940864 in words is "seventy-nine billion, sixty-eight million, nine hundred forty thousand, eight hundred sixty-four".