26990244653 has 2 divisors, whose sum is σ = 26990244654. Its totient is φ = 26990244652.

The previous prime is 26990244641. The next prime is 26990244683. The reversal of 26990244653 is 35644209962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26936030884 + 54213769 = 164122^2 + 7363^2 .

It is a cyclic number.

It is not a de Polignac number, because 26990244653 - 2⁴ = 26990244637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26990244613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13495122326 + 13495122327.

It is an arithmetic number, because the mean of its divisors is an integer number (13495122327).

Almost surely, 2^26990244653 is an apocalyptic number.

It is an amenable number.

26990244653 is a deficient number, since it is larger than the sum of its proper divisors (1).

26990244653 is an equidigital number, since it uses as much as digits as its factorization.

26990244653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 26990244653 in words is "twenty-six billion, nine hundred ninety million, two hundred forty-four thousand, six hundred fifty-three".