79775584091 has 16 divisors (see below), whose sum is σ = 93156320256. Its totient is φ = 66892291776.

The previous prime is 79775584067. The next prime is 79775584093. The reversal of 79775584091 is 19048557797.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 79775584091 - 2⁶ = 79775584027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79775584093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646340 + ... + 759806.

It is an arithmetic number, because the mean of its divisors is an integer number (5822270016).

Almost surely, 2^79775584091 is an apocalyptic number.

79775584091 is a deficient number, since it is larger than the sum of its proper divisors (13380736165).

79775584091 is a wasteful number, since it uses less digits than its factorization.

79775584091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115658.

The product of its (nonzero) digits is 22226400, while the sum is 62.

The spelling of 79775584091 in words is "seventy-nine billion, seven hundred seventy-five million, five hundred eighty-four thousand, ninety-one".