79165137769 has 3 divisors (see below), whose sum is σ = 79165419133. Its totient is φ = 79164856406.

The previous prime is 79165137757. The next prime is 79165137817. The reversal of 79165137769 is 96773156197.

The square root of 79165137769 is 281363.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 79165137769 - 2⁷ = 79165137641 is a prime.

It is a super-2 number, since 2×79165137769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79165137739) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 140682 + ... + 422044.

Almost surely, 2^79165137769 is an apocalyptic number.

79165137769 is the 281363-rd square number.

79165137769 is the 140682-nd centered octagonal number.

It is an amenable number.

79165137769 is a deficient number, since it is larger than the sum of its proper divisors (281364).

79165137769 is an frugal number, since it uses more digits than its factorization.

79165137769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562726 (or 281363 counting only the distinct ones).

The product of its digits is 15002820, while the sum is 61.

The spelling of 79165137769 in words is "seventy-nine billion, one hundred sixty-five million, one hundred thirty-seven thousand, seven hundred sixty-nine".