25115435089 has 2 divisors, whose sum is σ = 25115435090. Its totient is φ = 25115435088.

The previous prime is 25115435071. The next prime is 25115435117. The reversal of 25115435089 is 98053451152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21078103489 + 4037331600 = 145183^2 + 63540^2 .

It is a cyclic number.

It is not a de Polignac number, because 25115435089 - 2⁷ = 25115434961 is a prime.

It is not a weakly prime, because it can be changed into another prime (25115435029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557717544 + 12557717545.

It is an arithmetic number, because the mean of its divisors is an integer number (12557717545).

Almost surely, 2^25115435089 is an apocalyptic number.

It is an amenable number.

25115435089 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115435089 is an equidigital number, since it uses as much as digits as its factorization.

25115435089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 25115435089 in words is "twenty-five billion, one hundred fifteen million, four hundred thirty-five thousand, eighty-nine".