26806563 has 12 divisors (see below), whose sum is σ = 44252208. Its totient is φ = 15318000.

The previous prime is 26806541. The next prime is 26806583. The reversal of 26806563 is 36560862.

It is not a de Polignac number, because 26806563 - 2⁵ = 26806531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26806513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212688 + ... + 212813.

It is an arithmetic number, because the mean of its divisors is an integer number (3687684).

Almost surely, 2^26806563 is an apocalyptic number.

26806563 is a deficient number, since it is larger than the sum of its proper divisors (17445645).

26806563 is a wasteful number, since it uses less digits than its factorization.

26806563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425514 (or 425511 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 26806563 is about 5177.5054804413. The cubic root of 26806563 is about 299.2818489018.

The spelling of 26806563 in words is "twenty-six million, eight hundred six thousand, five hundred sixty-three".