25555268859 has 4 divisors (see below), whose sum is σ = 34073691816. Its totient is φ = 17036845904.

The previous prime is 25555268839. The next prime is 25555268861. The reversal of 25555268859 is 95886255552.

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 25555268859 - 2¹⁷ = 25555137787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25555268839) 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 3 ways as a sum of consecutive naturals, for example, 4259211474 + ... + 4259211479.

It is an arithmetic number, because the mean of its divisors is an integer number (8518422954).

Almost surely, 2^25555268859 is an apocalyptic number.

25555268859 is a deficient number, since it is larger than the sum of its proper divisors (8518422957).

25555268859 is an equidigital number, since it uses as much as digits as its factorization.

25555268859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518422956.

The product of its digits is 43200000, while the sum is 60.

The spelling of 25555268859 in words is "twenty-five billion, five hundred fifty-five million, two hundred sixty-eight thousand, eight hundred fifty-nine".