2180944782 has 12 divisors (see below), whose sum is σ = 4725380400. Its totient is φ = 726981588.

The previous prime is 2180944781. The next prime is 2180944783. The reversal of 2180944782 is 2874490812.

It is an interprime number because it is at equal distance from previous prime (2180944781) and next prime (2180944783).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180944781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60581782 + ... + 60581817.

It is an arithmetic number, because the mean of its divisors is an integer number (393781700).

Almost surely, 2^2180944782 is an apocalyptic number.

2180944782 is an abundant number, since it is smaller than the sum of its proper divisors (2544435618).

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

2180944782 is a wasteful number, since it uses less digits than its factorization.

2180944782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121163607 (or 121163604 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 2180944782 is about 46700.5865273660. The cubic root of 2180944782 is about 1296.8255449797.

The spelling of 2180944782 in words is "two billion, one hundred eighty million, nine hundred forty-four thousand, seven hundred eighty-two".