25328889121 has 2 divisors, whose sum is σ = 25328889122. Its totient is φ = 25328889120.

The previous prime is 25328889041. The next prime is 25328889149. The reversal of 25328889121 is 12198882352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14282879121 + 11046010000 = 119511^2 + 105100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25328889121 is a prime.

It is not a weakly prime, because it can be changed into another prime (25328889161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12664444560 + 12664444561.

It is an arithmetic number, because the mean of its divisors is an integer number (12664444561).

Almost surely, 2^25328889121 is an apocalyptic number.

It is an amenable number.

25328889121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25328889121 is an equidigital number, since it uses as much as digits as its factorization.

25328889121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 49.

The spelling of 25328889121 in words is "twenty-five billion, three hundred twenty-eight million, eight hundred eighty-nine thousand, one hundred twenty-one".