2185750656 has 160 divisors (see below), whose sum is σ = 6887946780. Its totient is φ = 685670400.

The previous prime is 2185750627. The next prime is 2185750667. The reversal of 2185750656 is 6560575812.

2185750656 is a `hidden beast` number, since 2 + 18 + 575 + 0 + 65 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2170069056 + 15681600 = 46584^2 + 3960^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170056 + ... + 182456.

Almost surely, 2^2185750656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2185750656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3443973390).

2185750656 is an abundant number, since it is smaller than the sum of its proper divisors (4702196124).

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

2185750656 is a wasteful number, since it uses less digits than its factorization.

2185750656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444 (or 12423 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 2185750656 is about 46752.0123203269. The cubic root of 2185750656 is about 1297.7773966694. Note that the first 3 decimals are identical.

The spelling of 2185750656 in words is "two billion, one hundred eighty-five million, seven hundred fifty thousand, six hundred fifty-six".