26552476781 has 4 divisors (see below), whose sum is σ = 26571323100. Its totient is φ = 26533630464.

The previous prime is 26552476757. The next prime is 26552476787. The reversal of 26552476781 is 18767425562.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9473907556 + 17078569225 = 97334^2 + 130685^2 .

It is a cyclic number.

It is not a de Polignac number, because 26552476781 - 2³⁴ = 9372607597 is a prime.

It is a super-2 number, since 2×26552476781² (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 (26552476787) 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, 9421046 + ... + 9423863.

It is an arithmetic number, because the mean of its divisors is an integer number (6642830775).

Almost surely, 2^26552476781 is an apocalyptic number.

It is an amenable number.

26552476781 is a deficient number, since it is larger than the sum of its proper divisors (18846319).

26552476781 is a wasteful number, since it uses less digits than its factorization.

26552476781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846318.

The product of its digits is 5644800, while the sum is 53.

The spelling of 26552476781 in words is "twenty-six billion, five hundred fifty-two million, four hundred seventy-six thousand, seven hundred eighty-one".