2186774816 has 24 divisors (see below), whose sum is σ = 4306269744. Its totient is φ = 1093119040.

The previous prime is 2186774789. The next prime is 2186774819. The reversal of 2186774816 is 6184776812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2186774819) by changing a digit.

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, 218171 + ... + 227973.

It is an arithmetic number, because the mean of its divisors is an integer number (179427906).

Almost surely, 2^2186774816 is an apocalyptic number.

It is an amenable number.

2186774816 is a deficient number, since it is larger than the sum of its proper divisors (2119494928).

2186774816 is an equidigital number, since it uses as much as digits as its factorization.

2186774816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16784 (or 16776 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 2186774816 is about 46762.9641489930. The cubic root of 2186774816 is about 1297.9800614695.

The spelling of 2186774816 in words is "two billion, one hundred eighty-six million, seven hundred seventy-four thousand, eight hundred sixteen".