2144644812 has 18 divisors (see below), whose sum is σ = 5421185588. Its totient is φ = 714881592.

The previous prime is 2144644753. The next prime is 2144644847. The reversal of 2144644812 is 2184464412.

2144644812 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 644 + 8 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 59573467 = 2144644812 / (2 + 1 + 4 + 4 + 6 + 4 + 4 + 8 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29786698 + ... + 29786769.

Almost surely, 2^2144644812 is an apocalyptic number.

It is an amenable number.

2144644812 is an abundant number, since it is smaller than the sum of its proper divisors (3276540776).

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

2144644812 is a wasteful number, since it uses less digits than its factorization.

2144644812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59573477 (or 59573472 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 2144644812 is about 46310.3099968031. The cubic root of 2144644812 is about 1289.5904017780.

The spelling of 2144644812 in words is "two billion, one hundred forty-four million, six hundred forty-four thousand, eight hundred twelve".