26506711117 has 4 divisors (see below), whose sum is σ = 28065929436. Its totient is φ = 24947492800.

The previous prime is 26506711103. The next prime is 26506711129. The reversal of 26506711117 is 71111760562.

It is a happy number.

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 12036064681 + 14470646436 = 109709^2 + 120294^2 .

It is a cyclic number.

It is not a de Polignac number, because 26506711117 - 2¹⁵ = 26506678349 is a prime.

It is a super-3 number, since 3×26506711117³ (a number of 32 digits) contains 333 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 (26506711717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779609134 + ... + 779609167.

It is an arithmetic number, because the mean of its divisors is an integer number (7016482359).

Almost surely, 2^26506711117 is an apocalyptic number.

It is an amenable number.

26506711117 is a deficient number, since it is larger than the sum of its proper divisors (1559218319).

26506711117 is a wasteful number, since it uses less digits than its factorization.

26506711117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559218318.

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 26506711117 in words is "twenty-six billion, five hundred six million, seven hundred eleven thousand, one hundred seventeen".