79954914169 has 9 divisors (see below), whose sum is σ = 86582378799. Its totient is φ = 73801143000.

The previous prime is 79954914167. The next prime is 79954914251. The reversal of 79954914169 is 96141945997.

The square root of 79954914169 is 282763.

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., 11827650025 + 68127264144 = 108755^2 + 261012^2 .

It is not a de Polignac number, because 79954914169 - 2¹ = 79954914167 is a prime.

It is a super-2 number, since 2×79954914169² (a number of 23 digits) contains 22 as substring.

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 79954914169.

It is not an unprimeable number, because it can be changed into a prime (79954914167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3665044 + ... + 3686794.

It is an arithmetic number, because the mean of its divisors is an integer number (9620264311).

Almost surely, 2^79954914169 is an apocalyptic number.

79954914169 is the 282763-rd square number.

79954914169 is the 141382-nd centered octagonal number.

It is an amenable number.

79954914169 is a deficient number, since it is larger than the sum of its proper divisors (6627464630).

79954914169 is an frugal number, since it uses more digits than its factorization.

79954914169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43528 (or 21764 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 64.

Multiplying 79954914169 by its sum of digits (64), we get a square (5117114506816 = 2262104²).

The spelling of 79954914169 in words is "seventy-nine billion, nine hundred fifty-four million, nine hundred fourteen thousand, one hundred sixty-nine".