8172890565 has 96 divisors (see below), whose sum is σ = 16233563520. Its totient is φ = 3490615296.

The previous prime is 8172890533. The next prime is 8172890581. The reversal of 8172890565 is 5650982718.

8172890565 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8172890565 - 2⁵ = 8172890533 is a prime.

It is a super-3 number, since 3×8172890565³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1015437 + ... + 1023453.

It is an arithmetic number, because the mean of its divisors is an integer number (169099620).

Almost surely, 2^8172890565 is an apocalyptic number.

It is an amenable number.

8172890565 is a deficient number, since it is larger than the sum of its proper divisors (8060672955).

8172890565 is a wasteful number, since it uses less digits than its factorization.

8172890565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8131 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The square root of 8172890565 is about 90404.0406453163. The cubic root of 8172890565 is about 2014.3049868204.

The spelling of 8172890565 in words is "eight billion, one hundred seventy-two million, eight hundred ninety thousand, five hundred sixty-five".