27220641653 has 2 divisors, whose sum is σ = 27220641654. Its totient is φ = 27220641652.

The previous prime is 27220641641. The next prime is 27220641659. The reversal of 27220641653 is 35614602272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15361867249 + 11858774404 = 123943^2 + 108898^2 .

It is a cyclic number.

It is not a de Polignac number, because 27220641653 - 2¹⁸ = 27220379509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27220641659) 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, 13610320826 + 13610320827.

It is an arithmetic number, because the mean of its divisors is an integer number (13610320827).

Almost surely, 2^27220641653 is an apocalyptic number.

It is an amenable number.

27220641653 is a deficient number, since it is larger than the sum of its proper divisors (1).

27220641653 is an equidigital number, since it uses as much as digits as its factorization.

27220641653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 27220641653 in words is "twenty-seven billion, two hundred twenty million, six hundred forty-one thousand, six hundred fifty-three".