26000470781 has 2 divisors, whose sum is σ = 26000470782. Its totient is φ = 26000470780.

The previous prime is 26000470777. The next prime is 26000470801. The reversal of 26000470781 is 18707400062.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21914065156 + 4086405625 = 148034^2 + 63925^2 .

It is a cyclic number.

It is not a de Polignac number, because 26000470781 - 2² = 26000470777 is a prime.

It is a super-2 number, since 2×26000470781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26000470711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13000235390 + 13000235391.

It is an arithmetic number, because the mean of its divisors is an integer number (13000235391).

Almost surely, 2^26000470781 is an apocalyptic number.

It is an amenable number.

26000470781 is a deficient number, since it is larger than the sum of its proper divisors (1).

26000470781 is an equidigital number, since it uses as much as digits as its factorization.

26000470781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 26000470781 in words is "twenty-six billion, four hundred seventy thousand, seven hundred eighty-one".