26511 has 4 divisors (see below), whose sum is σ = 35352. Its totient is φ = 17672.

The previous prime is 26501. The next prime is 26513. The reversal of 26511 is 11562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26511 - 2⁵ = 26479 is a prime.

It is a D-number.

It is a plaindrome in base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4416 + ... + 4421.

It is an arithmetic number, because the mean of its divisors is an integer number (8838).

2²⁶⁵¹¹ is an apocalyptic number.

26511 is a deficient number, since it is larger than the sum of its proper divisors (8841).

26511 is an equidigital number, since it uses as much as digits as its factorization.

26511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8840.

The product of its digits is 60, while the sum is 15.

The square root of 26511 is about 162.8219886870. The cubic root of 26511 is about 29.8177843785.

It can be divided in two parts, 265 and 11, that added together give a triangular number (276 = T₂₃).

The spelling of 26511 in words is "twenty-six thousand, five hundred eleven".