8165638250 has 128 divisors (see below), whose sum is σ = 19887648768. Its totient is φ = 2434344000.

The previous prime is 8165638249. The next prime is 8165638253. The reversal of 8165638250 is 528365618.

It is a super-3 number, since 3×8165638250³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (8165638253) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 433529 + ... + 451971.

It is an arithmetic number, because the mean of its divisors is an integer number (155372256).

Almost surely, 2^8165638250 is an apocalyptic number.

8165638250 is an abundant number, since it is smaller than the sum of its proper divisors (11722010518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8165638250 is a wasteful number, since it uses less digits than its factorization.

8165638250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18501 (or 18491 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 8165638250 is about 90363.9211743271. The cubic root of 8165638250 is about 2013.7090043970.

The spelling of 8165638250 in words is "eight billion, one hundred sixty-five million, six hundred thirty-eight thousand, two hundred fifty".