79129605309 has 16 divisors (see below), whose sum is σ = 107351101440. Its totient is φ = 51831535280.

The previous prime is 79129605307. The next prime is 79129605323. The reversal of 79129605309 is 90350692197.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 79129605309 - 2¹ = 79129605307 is a prime.

It is a super-2 number, since 2×79129605309² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79129605307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220324 + ... + 454754.

It is an arithmetic number, because the mean of its divisors is an integer number (6709443840).

Almost surely, 2^79129605309 is an apocalyptic number.

It is an amenable number.

79129605309 is a deficient number, since it is larger than the sum of its proper divisors (28221496131).

79129605309 is a wasteful number, since it uses less digits than its factorization.

79129605309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236400.

The product of its (nonzero) digits is 918540, while the sum is 51.

The spelling of 79129605309 in words is "seventy-nine billion, one hundred twenty-nine million, six hundred five thousand, three hundred nine".