2149445816 has 32 divisors (see below), whose sum is σ = 4713075840. Its totient is φ = 899767008.

The previous prime is 2149445803. The next prime is 2149445873. The reversal of 2149445816 is 6185449412.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 443906 + ... + 448721.

It is an arithmetic number, because the mean of its divisors is an integer number (147283620).

Almost surely, 2^2149445816 is an apocalyptic number.

It is an amenable number.

2149445816 is an abundant number, since it is smaller than the sum of its proper divisors (2563630024).

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

2149445816 is a wasteful number, since it uses less digits than its factorization.

2149445816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892683 (or 892679 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 2149445816 is about 46362.1161725821. The cubic root of 2149445816 is about 1290.5519773900.

The spelling of 2149445816 in words is "two billion, one hundred forty-nine million, four hundred forty-five thousand, eight hundred sixteen".