16317491432903 has 4 divisors (see below), whose sum is σ = 16317701941968. Its totient is φ = 16317280923840.

The previous prime is 16317491432881. The next prime is 16317491432909. The reversal of 16317491432903 is 30923419471361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16317491432903 - 2⁶ = 16317491432839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16317491432909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105138218 + ... + 105293303.

It is an arithmetic number, because the mean of its divisors is an integer number (4079425485492).

Almost surely, 2^{16317491432903} is an apocalyptic number.

16317491432903 is a deficient number, since it is larger than the sum of its proper divisors (210509065).

16317491432903 is an equidigital number, since it uses as much as digits as its factorization.

16317491432903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210509064.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 16317491432903 in words is "sixteen trillion, three hundred seventeen billion, four hundred ninety-one million, four hundred thirty-two thousand, nine hundred three".