25461810889 has 2 divisors, whose sum is σ = 25461810890. Its totient is φ = 25461810888.

The previous prime is 25461810851. The next prime is 25461810923. The reversal of 25461810889 is 98801816452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22764774400 + 2697036489 = 150880^2 + 51933^2 .

It is a cyclic number.

It is not a de Polignac number, because 25461810889 - 2⁷ = 25461810761 is a prime.

It is not a weakly prime, because it can be changed into another prime (25461810989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12730905444 + 12730905445.

It is an arithmetic number, because the mean of its divisors is an integer number (12730905445).

Almost surely, 2^25461810889 is an apocalyptic number.

It is an amenable number.

25461810889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25461810889 is an equidigital number, since it uses as much as digits as its factorization.

25461810889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 25461810889 in words is "twenty-five billion, four hundred sixty-one million, eight hundred ten thousand, eight hundred eighty-nine".