2185145872 has 40 divisors (see below), whose sum is σ = 5210735936. Its totient is φ = 864452736.

The previous prime is 2185145861. The next prime is 2185145891. The reversal of 2185145872 is 2785415812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748938 + ... + 751849.

Almost surely, 2^2185145872 is an apocalyptic number.

It is an amenable number.

2185145872 is an abundant number, since it is smaller than the sum of its proper divisors (3025590064).

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

2185145872 is a wasteful number, since it uses less digits than its factorization.

2185145872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500815 (or 1500809 counting only the distinct ones).

The product of its digits is 179200, while the sum is 43.

The square root of 2185145872 is about 46745.5438731865. The cubic root of 2185145872 is about 1297.6576899066.

The spelling of 2185145872 in words is "two billion, one hundred eighty-five million, one hundred forty-five thousand, eight hundred seventy-two".