2161850784 has 24 divisors (see below), whose sum is σ = 5674858560. Its totient is φ = 720616896.

The previous prime is 2161850771. The next prime is 2161850807. The reversal of 2161850784 is 4870581612.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11259544 + ... + 11259735.

It is an arithmetic number, because the mean of its divisors is an integer number (236452440).

Almost surely, 2^2161850784 is an apocalyptic number.

2161850784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2161850784 is an abundant number, since it is smaller than the sum of its proper divisors (3513007776).

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

2161850784 is a wasteful number, since it uses less digits than its factorization.

2161850784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22519292 (or 22519284 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 2161850784 is about 46495.7071566828. The cubic root of 2161850784 is about 1293.0299116984.

The spelling of 2161850784 in words is "two billion, one hundred sixty-one million, eight hundred fifty thousand, seven hundred eighty-four".