26650649 has 2 divisors, whose sum is σ = 26650650. Its totient is φ = 26650648.

The previous prime is 26650639. The next prime is 26650691. The reversal of 26650649 is 94605662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20866624 + 5784025 = 4568^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 26650649 - 2⁴ = 26650633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26650639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13325324 + 13325325.

It is an arithmetic number, because the mean of its divisors is an integer number (13325325).

Almost surely, 2^26650649 is an apocalyptic number.

It is an amenable number.

26650649 is a deficient number, since it is larger than the sum of its proper divisors (1).

26650649 is an equidigital number, since it uses as much as digits as its factorization.

26650649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 26650649 is about 5162.4266580747. The cubic root of 26650649 is about 298.7004864168.

The spelling of 26650649 in words is "twenty-six million, six hundred fifty thousand, six hundred forty-nine".