99172224805 has 4 divisors (see below), whose sum is σ = 119006669772. Its totient is φ = 79337779840.

The previous prime is 99172224773. The next prime is 99172224817. The reversal of 99172224805 is 50842227199.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51532178049 + 47640046756 = 227007^2 + 218266^2 .

It is not a de Polignac number, because 99172224805 - 2⁵ = 99172224773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9917222476 + ... + 9917222485.

It is an arithmetic number, because the mean of its divisors is an integer number (29751667443).

Almost surely, 2^99172224805 is an apocalyptic number.

It is an amenable number.

99172224805 is a deficient number, since it is larger than the sum of its proper divisors (19834444967).

99172224805 is a wasteful number, since it uses less digits than its factorization.

99172224805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19834444966.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 99172224805 in words is "ninety-nine billion, one hundred seventy-two million, two hundred twenty-four thousand, eight hundred five".