13664558633573 has 2 divisors, whose sum is σ = 13664558633574. Its totient is φ = 13664558633572.

The previous prime is 13664558633527. The next prime is 13664558633581. The reversal of 13664558633573 is 37533685546631.

13664558633573 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., 7013694162244 + 6650864471329 = 2648338^2 + 2578927^2 .

It is an emirp because it is prime and its reverse (37533685546631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13664558633573 - 2⁸ = 13664558633317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13664558630573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832279316786 + 6832279316787.

It is an arithmetic number, because the mean of its divisors is an integer number (6832279316787).

Almost surely, 2^{13664558633573} is an apocalyptic number.

It is an amenable number.

13664558633573 is a deficient number, since it is larger than the sum of its proper divisors (1).

13664558633573 is an equidigital number, since it uses as much as digits as its factorization.

13664558633573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888000, while the sum is 65.

The spelling of 13664558633573 in words is "thirteen trillion, six hundred sixty-four billion, five hundred fifty-eight million, six hundred thirty-three thousand, five hundred seventy-three".