16161685173 has 24 divisors (see below), whose sum is σ = 24104770560. Its totient is φ = 10423838880.

The previous prime is 16161685157. The next prime is 16161685193. The reversal of 16161685173 is 37158616161.

16161685173 is a `hidden beast` number, since 1 + 616 + 16 + 8 + 5 + 17 + 3 = 666.

It is not a de Polignac number, because 16161685173 - 2⁴ = 16161685157 is a prime.

It is a super-2 number, since 2×16161685173² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161685193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1314388 + ... + 1326626.

It is an arithmetic number, because the mean of its divisors is an integer number (1004365440).

Almost surely, 2^16161685173 is an apocalyptic number.

It is an amenable number.

16161685173 is a deficient number, since it is larger than the sum of its proper divisors (7943085387).

16161685173 is a wasteful number, since it uses less digits than its factorization.

16161685173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17009 (or 17006 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The spelling of 16161685173 in words is "sixteen billion, one hundred sixty-one million, six hundred eighty-five thousand, one hundred seventy-three".