2259398642 has 54 divisors (see below), whose sum is σ = 3766176999. Its totient is φ = 1016396640.

The previous prime is 2259398641. The next prime is 2259398677. The reversal of 2259398642 is 2468939522.

It can be written as a sum of positive squares in 5 ways, for example, as 94264681 + 2165133961 = 9709^2 + 46531^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=33611.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2259398641) 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 26 ways as a sum of consecutive naturals, for example, 37039292 + ... + 37039352.

Almost surely, 2^2259398642 is an apocalyptic number.

2259398642 is a deficient number, since it is larger than the sum of its proper divisors (1506778357).

2259398642 is an equidigital number, since it uses as much as digits as its factorization.

2259398642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 111 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The square root of 2259398642 is about 47533.1320449221. The cubic root of 2259398642 is about 1312.1927113966.

Multiplying 2259398642 by its sum of digits (50), we get a square (112969932100 = 336110²).

The spelling of 2259398642 in words is "two billion, two hundred fifty-nine million, three hundred ninety-eight thousand, six hundred forty-two".