25089685091 has 2 divisors, whose sum is σ = 25089685092. Its totient is φ = 25089685090.

The previous prime is 25089685087. The next prime is 25089685123. The reversal of 25089685091 is 19058698052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25089685091 - 2² = 25089685087 is a prime.

It is not a weakly prime, because it can be changed into another prime (25089685001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12544842545 + 12544842546.

It is an arithmetic number, because the mean of its divisors is an integer number (12544842546).

Almost surely, 2^25089685091 is an apocalyptic number.

25089685091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25089685091 is an equidigital number, since it uses as much as digits as its factorization.

25089685091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 25089685091 in words is "twenty-five billion, eighty-nine million, six hundred eighty-five thousand, ninety-one".