26564572231 has 4 divisors (see below), whose sum is σ = 26566079200. Its totient is φ = 26563065264.

The previous prime is 26564572213. The next prime is 26564572253. The reversal of 26564572231 is 13227546562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13227546562 = 2 ⋅6613773281.

It is a cyclic number.

It is not a de Polignac number, because 26564572231 - 2¹¹ = 26564570183 is a prime.

It is a super-2 number, since 2×26564572231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26564572211) 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, 726726 + ... + 762403.

It is an arithmetic number, because the mean of its divisors is an integer number (6641519800).

Almost surely, 2^26564572231 is an apocalyptic number.

26564572231 is a deficient number, since it is larger than the sum of its proper divisors (1506969).

26564572231 is a wasteful number, since it uses less digits than its factorization.

26564572231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506968.

The product of its digits is 604800, while the sum is 43.

The spelling of 26564572231 in words is "twenty-six billion, five hundred sixty-four million, five hundred seventy-two thousand, two hundred thirty-one".