2144378259 has 16 divisors (see below), whose sum is σ = 3180045600. Its totient is φ = 1428150528.

The previous prime is 2144378239. The next prime is 2144378261. The reversal of 2144378259 is 9528734412.

2144378259 is a `hidden beast` number, since 21 + 4 + 4 + 378 + 259 = 666.

It is not a de Polignac number, because 2144378259 - 2⁹ = 2144377747 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2144378219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12114 + ... + 66599.

It is an arithmetic number, because the mean of its divisors is an integer number (198752850).

Almost surely, 2^2144378259 is an apocalyptic number.

2144378259 is a deficient number, since it is larger than the sum of its proper divisors (1035667341).

2144378259 is a wasteful number, since it uses less digits than its factorization.

2144378259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79731 (or 79725 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 2144378259 is about 46307.4320061046. The cubic root of 2144378259 is about 1289.5369728169.

The spelling of 2144378259 in words is "two billion, one hundred forty-four million, three hundred seventy-eight thousand, two hundred fifty-nine".