26507563 has 2 divisors, whose sum is σ = 26507564. Its totient is φ = 26507562.

The previous prime is 26507561. The next prime is 26507587. The reversal of 26507563 is 36570562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26507563 - 2¹ = 26507561 is a prime.

Together with 26507561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26507561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13253781 + 13253782.

It is an arithmetic number, because the mean of its divisors is an integer number (13253782).

Almost surely, 2^26507563 is an apocalyptic number.

26507563 is a deficient number, since it is larger than the sum of its proper divisors (1).

26507563 is an equidigital number, since it uses as much as digits as its factorization.

26507563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 26507563 is about 5148.5496015868. The cubic root of 26507563 is about 298.1649575428.

The spelling of 26507563 in words is "twenty-six million, five hundred seven thousand, five hundred sixty-three".