2180360778 has 8 divisors (see below), whose sum is σ = 4360721568. Its totient is φ = 726786924.

The previous prime is 2180360761. The next prime is 2180360779. The reversal of 2180360778 is 8770630812.

It is a sphenic number, since it is the product of 3 distinct primes.

2180360778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2180360779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181696726 + ... + 181696737.

It is an arithmetic number, because the mean of its divisors is an integer number (545090196).

Almost surely, 2^2180360778 is an apocalyptic number.

2180360778 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.

2180360778 is a wasteful number, since it uses less digits than its factorization.

2180360778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363393468.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 2180360778 is about 46694.3334677774. Note that the first 3 decimals coincide. The cubic root of 2180360778 is about 1296.7097818600.

The spelling of 2180360778 in words is "two billion, one hundred eighty million, three hundred sixty thousand, seven hundred seventy-eight".