16431533540173 has 4 divisors (see below), whose sum is σ = 16431752822080. Its totient is φ = 16431314258268.

The previous prime is 16431533540161. The next prime is 16431533540207. The reversal of 16431533540173 is 37104533513461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16431533540173 - 2²⁵ = 16431499985741 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 (16431533520173) 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 in 3 ways as a sum of consecutive naturals, for example, 109528515 + ... + 109678432.

It is an arithmetic number, because the mean of its divisors is an integer number (4107938205520).

Almost surely, 2^{16431533540173} is an apocalyptic number.

It is an amenable number.

16431533540173 is a deficient number, since it is larger than the sum of its proper divisors (219281907).

16431533540173 is an equidigital number, since it uses as much as digits as its factorization.

16431533540173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219281906.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 16431533540173 in words is "sixteen trillion, four hundred thirty-one billion, five hundred thirty-three million, five hundred forty thousand, one hundred seventy-three".