79297878609 has 16 divisors (see below), whose sum is σ = 119231749440. Its totient is φ = 52076217600.

The previous prime is 79297878601. The next prime is 79297878731. The reversal of 79297878609 is 90687879297.

79297878609 is a `hidden beast` number, since 7 + 9 + 2 + 9 + 7 + 8 + 7 + 8 + 609 = 666.

It is not a de Polignac number, because 79297878609 - 2³ = 79297878601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79297878601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21915792 + ... + 21919409.

It is an arithmetic number, because the mean of its divisors is an integer number (7451984340).

Almost surely, 2^79297878609 is an apocalyptic number.

It is an amenable number.

79297878609 is a deficient number, since it is larger than the sum of its proper divisors (39933870831).

79297878609 is a wasteful number, since it uses less digits than its factorization.

79297878609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43835277 (or 43835271 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 72.

The spelling of 79297878609 in words is "seventy-nine billion, two hundred ninety-seven million, eight hundred seventy-eight thousand, six hundred nine".