25385522647 has 2 divisors, whose sum is σ = 25385522648. Its totient is φ = 25385522646.

The previous prime is 25385522623. The next prime is 25385522713. The reversal of 25385522647 is 74622558352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25385522647 is a prime.

It is a super-2 number, since 2×25385522647² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25385522647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25385522047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12692761323 + 12692761324.

It is an arithmetic number, because the mean of its divisors is an integer number (12692761324).

Almost surely, 2^25385522647 is an apocalyptic number.

25385522647 is a deficient number, since it is larger than the sum of its proper divisors (1).

25385522647 is an equidigital number, since it uses as much as digits as its factorization.

25385522647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032000, while the sum is 49.

The spelling of 25385522647 in words is "twenty-five billion, three hundred eighty-five million, five hundred twenty-two thousand, six hundred forty-seven".