26401663811 has 2 divisors, whose sum is σ = 26401663812. Its totient is φ = 26401663810.

The previous prime is 26401663733. The next prime is 26401663837. The reversal of 26401663811 is 11836610462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26401663811 - 2³⁴ = 9221794627 is a prime.

It is not a weakly prime, because it can be changed into another prime (26401663411) 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, 13200831905 + 13200831906.

It is an arithmetic number, because the mean of its divisors is an integer number (13200831906).

Almost surely, 2^26401663811 is an apocalyptic number.

26401663811 is a deficient number, since it is larger than the sum of its proper divisors (1).

26401663811 is an equidigital number, since it uses as much as digits as its factorization.

26401663811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 26401663811 in words is "twenty-six billion, four hundred one million, six hundred sixty-three thousand, eight hundred eleven".