25089681091 has 2 divisors, whose sum is σ = 25089681092. Its totient is φ = 25089681090.

The previous prime is 25089681059. The next prime is 25089681119. The reversal of 25089681091 is 19018698052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25089681091 - 2⁵ = 25089681059 is a prime.

It is not a weakly prime, because it can be changed into another prime (25089681011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12544840545 + 12544840546.

It is an arithmetic number, because the mean of its divisors is an integer number (12544840546).

Almost surely, 2^25089681091 is an apocalyptic number.

25089681091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25089681091 is an equidigital number, since it uses as much as digits as its factorization.

25089681091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 25089681091 in words is "twenty-five billion, eighty-nine million, six hundred eighty-one thousand, ninety-one".