79554222728 has 12 divisors (see below), whose sum is σ = 149165663445. Its totient is φ = 39776712480.

The previous prime is 79554222647. The next prime is 79554222731. The reversal of 79554222728 is 82722245597.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 78679128004 + 875094724 = 280498^2 + 29582^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=199442.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79554222728.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 747908 + ... + 847628.

Almost surely, 2^79554222728 is an apocalyptic number.

It is an amenable number.

79554222728 is a deficient number, since it is larger than the sum of its proper divisors (69611440717).

79554222728 is an frugal number, since it uses more digits than its factorization.

79554222728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199448 (or 99723 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The spelling of 79554222728 in words is "seventy-nine billion, five hundred fifty-four million, two hundred twenty-two thousand, seven hundred twenty-eight".