25386591019 has 2 divisors, whose sum is σ = 25386591020. Its totient is φ = 25386591018.

The previous prime is 25386591017. The next prime is 25386591023. The reversal of 25386591019 is 91019568352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25386591019 - 2¹ = 25386591017 is a prime.

It is a super-2 number, since 2×25386591019² (a number of 22 digits) contains 22 as substring.

Together with 25386591017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25386591017) 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, 12693295509 + 12693295510.

It is an arithmetic number, because the mean of its divisors is an integer number (12693295510).

Almost surely, 2^25386591019 is an apocalyptic number.

25386591019 is a deficient number, since it is larger than the sum of its proper divisors (1).

25386591019 is an equidigital number, since it uses as much as digits as its factorization.

25386591019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 49.

The spelling of 25386591019 in words is "twenty-five billion, three hundred eighty-six million, five hundred ninety-one thousand, nineteen".