201509643103 has 2 divisors, whose sum is σ = 201509643104. Its totient is φ = 201509643102.

The previous prime is 201509643073. The next prime is 201509643143. The reversal of 201509643103 is 301346905102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201509643103 is a prime.

It is a super-2 number, since 2×201509643103² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201509643143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100754821551 + 100754821552.

It is an arithmetic number, because the mean of its divisors is an integer number (100754821552).

Almost surely, 2^201509643103 is an apocalyptic number.

201509643103 is a deficient number, since it is larger than the sum of its proper divisors (1).

201509643103 is an equidigital number, since it uses as much as digits as its factorization.

201509643103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 201509643103 in words is "two hundred one billion, five hundred nine million, six hundred forty-three thousand, one hundred three".