26646149 has 2 divisors, whose sum is σ = 26646150. Its totient is φ = 26646148.

The previous prime is 26646131. The next prime is 26646173. The reversal of 26646149 is 94164662.

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., 24930049 + 1716100 = 4993^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 26646149 - 2⁸ = 26645893 is a prime.

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 (26646199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13323074 + 13323075.

It is an arithmetic number, because the mean of its divisors is an integer number (13323075).

Almost surely, 2^26646149 is an apocalyptic number.

It is an amenable number.

26646149 is a deficient number, since it is larger than the sum of its proper divisors (1).

26646149 is an equidigital number, since it uses as much as digits as its factorization.

26646149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 26646149 is about 5161.9907981321. The cubic root of 26646149 is about 298.6836734698.

The spelling of 26646149 in words is "twenty-six million, six hundred forty-six thousand, one hundred forty-nine".