26581863131 has 2 divisors, whose sum is σ = 26581863132. Its totient is φ = 26581863130.

The previous prime is 26581863097. The next prime is 26581863137. The reversal of 26581863131 is 13136818562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26581863131 - 2¹⁴ = 26581846747 is a prime.

It is a super-2 number, since 2×26581863131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (26581863137) 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, 13290931565 + 13290931566.

It is an arithmetic number, because the mean of its divisors is an integer number (13290931566).

Almost surely, 2^26581863131 is an apocalyptic number.

26581863131 is a deficient number, since it is larger than the sum of its proper divisors (1).

26581863131 is an equidigital number, since it uses as much as digits as its factorization.

26581863131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The spelling of 26581863131 in words is "twenty-six billion, five hundred eighty-one million, eight hundred sixty-three thousand, one hundred thirty-one".