79321173771 has 64 divisors (see below), whose sum is σ = 127534694400. Its totient is φ = 42900278400.

The previous prime is 79321173751. The next prime is 79321173773. The reversal of 79321173771 is 17737112397.

It is a happy number.

It is not a de Polignac number, because 79321173771 - 2¹⁰ = 79321172747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79321173771.

It is not an unprimeable number, because it can be changed into a prime (79321173773) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7102690 + ... + 7113848.

It is an arithmetic number, because the mean of its divisors is an integer number (1992729600).

Almost surely, 2^79321173771 is an apocalyptic number.

79321173771 is a deficient number, since it is larger than the sum of its proper divisors (48213520629).

79321173771 is a wasteful number, since it uses less digits than its factorization.

79321173771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440.

The product of its digits is 388962, while the sum is 48.

The spelling of 79321173771 in words is "seventy-nine billion, three hundred twenty-one million, one hundred seventy-three thousand, seven hundred seventy-one".