79725275605 has 8 divisors (see below), whose sum is σ = 95819586264. Its totient is φ = 63680716800.

The previous prime is 79725275569. The next prime is 79725275633. The reversal of 79725275605 is 50657252797.

It can be written as a sum of positive squares in 4 ways, for example, as 33520483396 + 46204792209 = 183086^2 + 214953^2 .

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

It is not a de Polignac number, because 79725275605 - 2²¹ = 79723178453 is a prime.

It is a super-2 number, since 2×79725275605² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12434436 + ... + 12440845.

It is an arithmetic number, because the mean of its divisors is an integer number (11977448283).

Almost surely, 2^79725275605 is an apocalyptic number.

It is an amenable number.

79725275605 is a deficient number, since it is larger than the sum of its proper divisors (16094310659).

79725275605 is a wasteful number, since it uses less digits than its factorization.

79725275605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24875927.

The product of its (nonzero) digits is 9261000, while the sum is 55.

The spelling of 79725275605 in words is "seventy-nine billion, seven hundred twenty-five million, two hundred seventy-five thousand, six hundred five".