25131012989 has 2 divisors, whose sum is σ = 25131012990. Its totient is φ = 25131012988.

The previous prime is 25131012971. The next prime is 25131013097. The reversal of 25131012989 is 98921013152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24376576900 + 754436089 = 156130^2 + 27467^2 .

It is a cyclic number.

It is not a de Polignac number, because 25131012989 - 2⁸ = 25131012733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25131012089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565506494 + 12565506495.

It is an arithmetic number, because the mean of its divisors is an integer number (12565506495).

Almost surely, 2^25131012989 is an apocalyptic number.

It is an amenable number.

25131012989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131012989 is an equidigital number, since it uses as much as digits as its factorization.

25131012989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 25131012989 in words is "twenty-five billion, one hundred thirty-one million, twelve thousand, nine hundred eighty-nine".