26316100781 has 2 divisors, whose sum is σ = 26316100782. Its totient is φ = 26316100780.

The previous prime is 26316100709. The next prime is 26316100801. The reversal of 26316100781 is 18700161362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24419062756 + 1897038025 = 156266^2 + 43555^2 .

It is a cyclic number.

It is not a de Polignac number, because 26316100781 - 2²⁶ = 26248991917 is a prime.

It is a super-2 number, since 2×26316100781² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26316100381) 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, 13158050390 + 13158050391.

It is an arithmetic number, because the mean of its divisors is an integer number (13158050391).

Almost surely, 2^26316100781 is an apocalyptic number.

It is an amenable number.

26316100781 is a deficient number, since it is larger than the sum of its proper divisors (1).

26316100781 is an equidigital number, since it uses as much as digits as its factorization.

26316100781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 26316100781 in words is "twenty-six billion, three hundred sixteen million, one hundred thousand, seven hundred eighty-one".