8251804165 has 16 divisors (see below), whose sum is σ = 11437796160. Its totient is φ = 5648293120.

The previous prime is 8251804163. The next prime is 8251804181. The reversal of 8251804165 is 5614081528.

It is a happy number.

It is not a de Polignac number, because 8251804165 - 2¹ = 8251804163 is a prime.

It is a super-2 number, since 2×8251804165² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8251804163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4411795 + ... + 4413664.

It is an arithmetic number, because the mean of its divisors is an integer number (714862260).

Almost surely, 2^8251804165 is an apocalyptic number.

8251804165 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8251804165 is a deficient number, since it is larger than the sum of its proper divisors (3185991995).

8251804165 is a wasteful number, since it uses less digits than its factorization.

8251804165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825492.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 8251804165 is about 90839.4416814635. The cubic root of 8251804165 is about 2020.7672937935.

The spelling of 8251804165 in words is "eight billion, two hundred fifty-one million, eight hundred four thousand, one hundred sixty-five".