26918781133 has 2 divisors, whose sum is σ = 26918781134. Its totient is φ = 26918781132.

The previous prime is 26918781103. The next prime is 26918781187. The reversal of 26918781133 is 33118781962.

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., 20736576004 + 6182205129 = 144002^2 + 78627^2 .

It is a cyclic number.

It is not a de Polignac number, because 26918781133 - 2¹³ = 26918772941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26918781103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13459390566 + 13459390567.

It is an arithmetic number, because the mean of its divisors is an integer number (13459390567).

Almost surely, 2^26918781133 is an apocalyptic number.

It is an amenable number.

26918781133 is a deficient number, since it is larger than the sum of its proper divisors (1).

26918781133 is an equidigital number, since it uses as much as digits as its factorization.

26918781133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The spelling of 26918781133 in words is "twenty-six billion, nine hundred eighteen million, seven hundred eighty-one thousand, one hundred thirty-three".