8170239039769 has 27 divisors (see below), whose sum is σ = 8724931526493. Its totient is φ = 7649253790848.

The previous prime is 8170239039707. The next prime is 8170239039841. The reversal of 8170239039769 is 9679309320718.

It is a happy number.

The square root of 8170239039769 is 2858363.

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

It can be written as a sum of positive squares in 4 ways, for example, as 31200629769 + 8139038410000 = 176637^2 + 2852900^2 .

It is not a de Polignac number, because 8170239039769 - 2³⁵ = 8135879301401 is a prime.

It is a super-2 number, since 2×8170239039769² (a number of 27 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 8170239039769.

It is not an unprimeable number, because it can be changed into a prime (8170239037769) 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 26 ways as a sum of consecutive naturals, for example, 13460031064 + ... + 13460031670.

Almost surely, 2^{8170239039769} is an apocalyptic number.

8170239039769 is the 2858363-rd square number.

8170239039769 is the 1429182-nd centered octagonal number.

It is an amenable number.

8170239039769 is a deficient number, since it is larger than the sum of its proper divisors (554692486724).

8170239039769 is an frugal number, since it uses more digits than its factorization.

8170239039769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 64.

Multiplying 8170239039769 by its sum of digits (64), we get a square (522895298545216 = 22866904²).

The spelling of 8170239039769 in words is "eight trillion, one hundred seventy billion, two hundred thirty-nine million, thirty-nine thousand, seven hundred sixty-nine".