25005440489 has 2 divisors, whose sum is σ = 25005440490. Its totient is φ = 25005440488.

The previous prime is 25005440479. The next prime is 25005440527. The reversal of 25005440489 is 98404450052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22778355625 + 2227084864 = 150925^2 + 47192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25005440489 is a prime.

It is not a weakly prime, because it can be changed into another prime (25005440419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12502720244 + 12502720245.

It is an arithmetic number, because the mean of its divisors is an integer number (12502720245).

Almost surely, 2^25005440489 is an apocalyptic number.

It is an amenable number.

25005440489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25005440489 is an equidigital number, since it uses as much as digits as its factorization.

25005440489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 25005440489 in words is "twenty-five billion, five million, four hundred forty thousand, four hundred eighty-nine".