2187616844 has 12 divisors (see below), whose sum is σ = 4375233744. Its totient is φ = 937550064.

The previous prime is 2187616829. The next prime is 2187616853. The reversal of 2187616844 is 4486167812.

2187616844 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 39064559 + ... + 39064614.

It is an arithmetic number, because the mean of its divisors is an integer number (364602812).

Almost surely, 2^2187616844 is an apocalyptic number.

It is an amenable number.

2187616844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2187616844 is a wasteful number, since it uses less digits than its factorization.

2187616844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78129184 (or 78129182 counting only the distinct ones).

The product of its digits is 516096, while the sum is 47.

The square root of 2187616844 is about 46771.9664328965. The cubic root of 2187616844 is about 1298.1466378810.

The spelling of 2187616844 in words is "two billion, one hundred eighty-seven million, six hundred sixteen thousand, eight hundred forty-four".