25897444823 has 4 divisors (see below), whose sum is σ = 25898029920. Its totient is φ = 25896859728.

The previous prime is 25897444777. The next prime is 25897444829. The reversal of 25897444823 is 32844479852.

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 25897444823 - 2⁸ = 25897444567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897444829) 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, 220190 + ... + 316667.

It is an arithmetic number, because the mean of its divisors is an integer number (6474507480).

Almost surely, 2^25897444823 is an apocalyptic number.

25897444823 is a deficient number, since it is larger than the sum of its proper divisors (585097).

25897444823 is an equidigital number, since it uses as much as digits as its factorization.

25897444823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585096.

The product of its digits is 15482880, while the sum is 56.

The spelling of 25897444823 in words is "twenty-five billion, eight hundred ninety-seven million, four hundred forty-four thousand, eight hundred twenty-three".