2161864850 has 24 divisors (see below), whose sum is σ = 4022622000. Its totient is φ = 864411920.

The previous prime is 2161864807. The next prime is 2161864853. The reversal of 2161864850 is 584681612.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2161864798 and 2161864807.

It is not an unprimeable number, because it can be changed into a prime (2161864853) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 153401 + ... + 166899.

It is an arithmetic number, because the mean of its divisors is an integer number (167609250).

Almost surely, 2^2161864850 is an apocalyptic number.

2161864850 is a deficient number, since it is larger than the sum of its proper divisors (1860757150).

2161864850 is a wasteful number, since it uses less digits than its factorization.

2161864850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16714 (or 16709 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 2161864850 is about 46495.8584177129. The cubic root of 2161864850 is about 1293.0327160424.

It can be divided in two parts, 21618 and 64850, that added together give a palindrome (86468).

The spelling of 2161864850 in words is "two billion, one hundred sixty-one million, eight hundred sixty-four thousand, eight hundred fifty".