26431604011 has 4 divisors (see below), whose sum is σ = 26704094872. Its totient is φ = 26159113152.

The previous prime is 26431603993. The next prime is 26431604027. The reversal of 26431604011 is 11040613462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11040613462 = 2 ⋅5520306731.

It is a cyclic number.

It is not a de Polignac number, because 26431604011 - 2³¹ = 24284120363 is a prime.

It is a super-2 number, since 2×26431604011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26431634011) 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, 136245285 + ... + 136245478.

It is an arithmetic number, because the mean of its divisors is an integer number (6676023718).

Almost surely, 2^26431604011 is an apocalyptic number.

26431604011 is a deficient number, since it is larger than the sum of its proper divisors (272490861).

26431604011 is an equidigital number, since it uses as much as digits as its factorization.

26431604011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272490860.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 26431604011 in words is "twenty-six billion, four hundred thirty-one million, six hundred four thousand, eleven".