13520665633 has 2 divisors, whose sum is σ = 13520665634. Its totient is φ = 13520665632.

The previous prime is 13520665619. The next prime is 13520665637. The reversal of 13520665633 is 33656602531.

It is a happy number.

13520665633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11765307024 + 1755358609 = 108468^2 + 41897^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520665633 - 2⁹ = 13520665121 is a prime.

It is not a weakly prime, because it can be changed into another prime (13520665637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760332816 + 6760332817.

It is an arithmetic number, because the mean of its divisors is an integer number (6760332817).

Almost surely, 2^13520665633 is an apocalyptic number.

It is an amenable number.

13520665633 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520665633 is an equidigital number, since it uses as much as digits as its factorization.

13520665633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 40.

The spelling of 13520665633 in words is "thirteen billion, five hundred twenty million, six hundred sixty-five thousand, six hundred thirty-three".