36688617894769 has 3 divisors (see below), whose sum is σ = 36688623951883. Its totient is φ = 36688611837656.

The previous prime is 36688617894751. The next prime is 36688617894883. The reversal of 36688617894769 is 96749871688663.

It is a happy number.

The square root of 36688617894769 is 6057113.

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 can be written as a sum of positive squares in only one way, i.e., 26116443680625 + 10572174214144 = 5110425^2 + 3251488^2 .

It is a de Polignac number, because none of the positive numbers 2^k-36688617894769 is a prime.

It is a super-2 number, since 2×36688617894769² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36688617894769.

It is not an unprimeable number, because it can be changed into a prime (36688617898769) 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, 3028557 + ... + 9085669.

Almost surely, 2^{36688617894769} is an apocalyptic number.

36688617894769 is the 6057113-rd square number.

36688617894769 is the 3028557-th centered octagonal number.

It is an amenable number.

36688617894769 is a deficient number, since it is larger than the sum of its proper divisors (6057114).

36688617894769 is an frugal number, since it uses more digits than its factorization.

36688617894769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12114226 (or 6057113 counting only the distinct ones).

The product of its digits is 31603654656, while the sum is 88.

The spelling of 36688617894769 in words is "thirty-six trillion, six hundred eighty-eight billion, six hundred seventeen million, eight hundred ninety-four thousand, seven hundred sixty-nine".