8105645870 has 128 divisors (see below), whose sum is σ = 17823836160. Its totient is φ = 2594833920.

The previous prime is 8105645843. The next prime is 8105645909. The reversal of 8105645870 is 785465018.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 23359037 + ... + 23359383.

It is an arithmetic number, because the mean of its divisors is an integer number (139248720).

Almost surely, 2^8105645870 is an apocalyptic number.

8105645870 is an abundant number, since it is smaller than the sum of its proper divisors (9718190290).

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

8105645870 is a wasteful number, since it uses less digits than its factorization.

8105645870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 8105645870 is about 90031.3604806681. The cubic root of 8105645870 is about 2008.7653506925.

The spelling of 8105645870 in words is "eight billion, one hundred five million, six hundred forty-five thousand, eight hundred seventy".