16505850773 has 4 divisors (see below), whose sum is σ = 16578564000. Its totient is φ = 16433137548.

The previous prime is 16505850761. The next prime is 16505850821. The reversal of 16505850773 is 37705850561.

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 16505850773 - 2²⁶ = 16438741909 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 (16505853773) 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, 36356273 + ... + 36356726.

It is an arithmetic number, because the mean of its divisors is an integer number (4144641000).

Almost surely, 2^16505850773 is an apocalyptic number.

It is an amenable number.

16505850773 is a deficient number, since it is larger than the sum of its proper divisors (72713227).

16505850773 is an equidigital number, since it uses as much as digits as its factorization.

16505850773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72713226.

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 16505850773 in words is "sixteen billion, five hundred five million, eight hundred fifty thousand, seven hundred seventy-three".