26646281 has 2 divisors, whose sum is σ = 26646282. Its totient is φ = 26646280.

The previous prime is 26646199. The next prime is 26646289. The reversal of 26646281 is 18264662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 12845056 = 3715^2 + 3584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26646281 is a prime.

It is a super-2 number, since 2×26646281² = 1420048582261922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26646289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13323140 + 13323141.

It is an arithmetic number, because the mean of its divisors is an integer number (13323141).

Almost surely, 2^26646281 is an apocalyptic number.

It is an amenable number.

26646281 is a deficient number, since it is larger than the sum of its proper divisors (1).

26646281 is an equidigital number, since it uses as much as digits as its factorization.

26646281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 26646281 is about 5162.0035838810. The cubic root of 26646281 is about 298.6841666765.

The spelling of 26646281 in words is "twenty-six million, six hundred forty-six thousand, two hundred eighty-one".