25853567489 has 4 divisors (see below), whose sum is σ = 25854180180. Its totient is φ = 25852954800.

The previous prime is 25853567471. The next prime is 25853567491. The reversal of 25853567489 is 98476535852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10469382400 + 15384185089 = 102320^2 + 124033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25853567489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25853567449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237962 + ... + 329139.

It is an arithmetic number, because the mean of its divisors is an integer number (6463545045).

Almost surely, 2^25853567489 is an apocalyptic number.

It is an amenable number.

25853567489 is a deficient number, since it is larger than the sum of its proper divisors (612691).

25853567489 is an equidigital number, since it uses as much as digits as its factorization.

25853567489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612690.

The product of its digits is 72576000, while the sum is 62.

The spelling of 25853567489 in words is "twenty-five billion, eight hundred fifty-three million, five hundred sixty-seven thousand, four hundred eighty-nine".