79169242505 has 8 divisors (see below), whose sum is σ = 100591508232. Its totient is φ = 59609782528.

The previous prime is 79169242489. The next prime is 79169242507. The reversal of 79169242505 is 50524296197.

It can be written as a sum of positive squares in 4 ways, for example, as 6793715776 + 72375526729 = 82424^2 + 269027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79169242505 - 2⁴ = 79169242489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79169242507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465701342 + ... + 465701511.

It is an arithmetic number, because the mean of its divisors is an integer number (12573938529).

Almost surely, 2^79169242505 is an apocalyptic number.

It is an amenable number.

79169242505 is a deficient number, since it is larger than the sum of its proper divisors (21422265727).

79169242505 is a wasteful number, since it uses less digits than its factorization.

79169242505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931402875.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 79169242505 in words is "seventy-nine billion, one hundred sixty-nine million, two hundred forty-two thousand, five hundred five".