13663532473 has 2 divisors, whose sum is σ = 13663532474. Its totient is φ = 13663532472.

The previous prime is 13663532437. The next prime is 13663532579. The reversal of 13663532473 is 37423536631.

It is a happy number.

Together with previous prime (13663532437) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13121015209 + 542517264 = 114547^2 + 23292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13663532473 is a prime.

It is not a weakly prime, because it can be changed into another prime (13663532413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6831766236 + 6831766237.

It is an arithmetic number, because the mean of its divisors is an integer number (6831766237).

Almost surely, 2^13663532473 is an apocalyptic number.

It is an amenable number.

13663532473 is a deficient number, since it is larger than the sum of its proper divisors (1).

13663532473 is an equidigital number, since it uses as much as digits as its factorization.

13663532473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 43.

The spelling of 13663532473 in words is "thirteen billion, six hundred sixty-three million, five hundred thirty-two thousand, four hundred seventy-three".