2149337787844 has 81 divisors (see below), whose sum is σ = 4117545691623. Its totient is φ = 981252889344.

The previous prime is 2149337787841. The next prime is 2149337787853. The reversal of 2149337787844 is 4487877339412.

The square root of 2149337787844 is 1466062.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1603925997444 + 545411790400 = 1266462^2 + 738520^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2149337787844.

It is not an unprimeable number, because it can be changed into a prime (2149337787841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4307289907 + ... + 4307290405.

Almost surely, 2^{2149337787844} is an apocalyptic number.

2149337787844 is the 1466062-nd square number.

It is an amenable number.

2149337787844 is a deficient number, since it is larger than the sum of its proper divisors (1968207903779).

2149337787844 is an equidigital number, since it uses as much as digits as its factorization.

2149337787844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254 (or 627 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 67.

The spelling of 2149337787844 in words is "two trillion, one hundred forty-nine billion, three hundred thirty-seven million, seven hundred eighty-seven thousand, eight hundred forty-four".