26777631791 has 2 divisors, whose sum is σ = 26777631792. Its totient is φ = 26777631790.

The previous prime is 26777631731. The next prime is 26777631841. The reversal of 26777631791 is 19713677762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26777631791 - 2¹⁴ = 26777615407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26777631731) 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 as a sum of consecutive naturals, namely, 13388815895 + 13388815896.

It is an arithmetic number, because the mean of its divisors is an integer number (13388815896).

Almost surely, 2^26777631791 is an apocalyptic number.

26777631791 is a deficient number, since it is larger than the sum of its proper divisors (1).

26777631791 is an equidigital number, since it uses as much as digits as its factorization.

26777631791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4667544, while the sum is 56.

The spelling of 26777631791 in words is "twenty-six billion, seven hundred seventy-seven million, six hundred thirty-one thousand, seven hundred ninety-one".