26818646443 has 2 divisors, whose sum is σ = 26818646444. Its totient is φ = 26818646442.

The previous prime is 26818646389. The next prime is 26818646467. The reversal of 26818646443 is 34464681862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26818646443 is a prime.

It is not a weakly prime, because it can be changed into another prime (26818646483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13409323221 + 13409323222.

It is an arithmetic number, because the mean of its divisors is an integer number (13409323222).

Almost surely, 2^26818646443 is an apocalyptic number.

26818646443 is a deficient number, since it is larger than the sum of its proper divisors (1).

26818646443 is an equidigital number, since it uses as much as digits as its factorization.

26818646443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5308416, while the sum is 52.

The spelling of 26818646443 in words is "twenty-six billion, eight hundred eighteen million, six hundred forty-six thousand, four hundred forty-three".