2185564264 has 16 divisors (see below), whose sum is σ = 4413158820. Its totient is φ = 1008721920.

The previous prime is 2185564247. The next prime is 2185564289. The reversal of 2185564264 is 4624655812.

It can be written as a sum of positive squares in 2 ways, for example, as 2185562500 + 1764 = 46750^2 + 42^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2185564264.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10507417 + ... + 10507624.

Almost surely, 2^2185564264 is an apocalyptic number.

It is an amenable number.

2185564264 is an abundant number, since it is smaller than the sum of its proper divisors (2227594556).

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

2185564264 is a wasteful number, since it uses less digits than its factorization.

2185564264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015060 (or 21015056 counting only the distinct ones).

The product of its digits is 460800, while the sum is 43.

The square root of 2185564264 is about 46750.0188663064. The cubic root of 2185564264 is about 1297.7405058801.

The spelling of 2185564264 in words is "two billion, one hundred eighty-five million, five hundred sixty-four thousand, two hundred sixty-four".