25261525489 has 16 divisors (see below), whose sum is σ = 26332784640. Its totient is φ = 24207194880.

The previous prime is 25261525481. The next prime is 25261525493. The reversal of 25261525489 is 98452516252.

It is a cyclic number.

It is not a de Polignac number, because 25261525489 - 2³ = 25261525481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25261525481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1729752 + ... + 1744294.

It is an arithmetic number, because the mean of its divisors is an integer number (1645799040).

Almost surely, 2^25261525489 is an apocalyptic number.

It is an amenable number.

25261525489 is a deficient number, since it is larger than the sum of its proper divisors (1071259151).

25261525489 is a wasteful number, since it uses less digits than its factorization.

25261525489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15120.

The product of its digits is 1728000, while the sum is 49.

The spelling of 25261525489 in words is "twenty-five billion, two hundred sixty-one million, five hundred twenty-five thousand, four hundred eighty-nine".