201449665013 has 2 divisors, whose sum is σ = 201449665014. Its totient is φ = 201449665012.

The previous prime is 201449665003. The next prime is 201449665037. The reversal of 201449665013 is 310566944102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173594722609 + 27854942404 = 416647^2 + 166898^2 .

It is a cyclic number.

It is not a de Polignac number, because 201449665013 - 2¹² = 201449660917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201449665003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100724832506 + 100724832507.

It is an arithmetic number, because the mean of its divisors is an integer number (100724832507).

Almost surely, 2^201449665013 is an apocalyptic number.

It is an amenable number.

201449665013 is a deficient number, since it is larger than the sum of its proper divisors (1).

201449665013 is an equidigital number, since it uses as much as digits as its factorization.

201449665013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 201449665013 in words is "two hundred one billion, four hundred forty-nine million, six hundred sixty-five thousand, thirteen".