79018896609 has 9 divisors (see below), whose sum is σ = 114139624339. Its totient is φ = 52678702200.

The previous prime is 79018896557. The next prime is 79018896673. The reversal of 79018896609 is 90669881097.

The square root of 79018896609 is 281103.

It is a perfect power (a square), and thus also a powerful number.

79018896609 is a `hidden beast` number, since 7 + 9 + 0 + 18 + 8 + 9 + 6 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76755040209 + 2263856400 = 277047^2 + 47580^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 79018896609 - 2⁹ = 79018896097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79018894609) 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, 796459 + ... + 890159.

Almost surely, 2^79018896609 is an apocalyptic number.

79018896609 is the 281103-rd square number.

79018896609 is the 140552-nd centered octagonal number.

It is an amenable number.

79018896609 is a deficient number, since it is larger than the sum of its proper divisors (35120727730).

79018896609 is an frugal number, since it uses more digits than its factorization.

79018896609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187408 (or 93704 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The spelling of 79018896609 in words is "seventy-nine billion, eighteen million, eight hundred ninety-six thousand, six hundred nine".