26783567231 has 2 divisors, whose sum is σ = 26783567232. Its totient is φ = 26783567230.

The previous prime is 26783567197. The next prime is 26783567233. The reversal of 26783567231 is 13276538762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26783567231 - 2¹⁰ = 26783566207 is a prime.

It is a super-2 number, since 2×26783567231² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 26783567233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26783567231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26783567233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13391783615 + 13391783616.

It is an arithmetic number, because the mean of its divisors is an integer number (13391783616).

Almost surely, 2^26783567231 is an apocalyptic number.

26783567231 is a deficient number, since it is larger than the sum of its proper divisors (1).

26783567231 is an equidigital number, since it uses as much as digits as its factorization.

26783567231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 50.

The spelling of 26783567231 in words is "twenty-six billion, seven hundred eighty-three million, five hundred sixty-seven thousand, two hundred thirty-one".