26286705647 has 2 divisors, whose sum is σ = 26286705648. Its totient is φ = 26286705646.

The previous prime is 26286705553. The next prime is 26286705659. The reversal of 26286705647 is 74650768262.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26286705647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26286705677) 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, 13143352823 + 13143352824.

It is an arithmetic number, because the mean of its divisors is an integer number (13143352824).

Almost surely, 2^26286705647 is an apocalyptic number.

26286705647 is a deficient number, since it is larger than the sum of its proper divisors (1).

26286705647 is an equidigital number, since it uses as much as digits as its factorization.

26286705647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 26286705647 in words is "twenty-six billion, two hundred eighty-six million, seven hundred five thousand, six hundred forty-seven".