2559925891 has 4 divisors (see below), whose sum is σ = 2569372384. Its totient is φ = 2550479400.

The previous prime is 2559925861. The next prime is 2559925969. The reversal of 2559925891 is 1985299552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2559925891 - 2¹³ = 2559917699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2559925831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4722840 + ... + 4723381.

It is an arithmetic number, because the mean of its divisors is an integer number (642343096).

Almost surely, 2^2559925891 is an apocalyptic number.

2559925891 is a deficient number, since it is larger than the sum of its proper divisors (9446493).

2559925891 is an equidigital number, since it uses as much as digits as its factorization.

2559925891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9446492.

The product of its digits is 2916000, while the sum is 55.

The square root of 2559925891 is about 50595.7102035341. The cubic root of 2559925891 is about 1367.9675567340.

The spelling of 2559925891 in words is "two billion, five hundred fifty-nine million, nine hundred twenty-five thousand, eight hundred ninety-one".