16557513273 has 48 divisors (see below), whose sum is σ = 30464104320. Its totient is φ = 8436192768.

The previous prime is 16557513253. The next prime is 16557513281. The reversal of 16557513273 is 37231575561.

16557513273 is a `hidden beast` number, since 1 + 6 + 5 + 575 + 1 + 3 + 2 + 73 = 666.

It is not a de Polignac number, because 16557513273 - 2²⁰ = 16556464697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16557513233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386490 + ... + 427187.

It is an arithmetic number, because the mean of its divisors is an integer number (634668840).

Almost surely, 2^16557513273 is an apocalyptic number.

It is an amenable number.

16557513273 is a deficient number, since it is larger than the sum of its proper divisors (13906591047).

16557513273 is a wasteful number, since it uses less digits than its factorization.

16557513273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813726 (or 813723 counting only the distinct ones).

The product of its digits is 661500, while the sum is 45.

The spelling of 16557513273 in words is "sixteen billion, five hundred fifty-seven million, five hundred thirteen thousand, two hundred seventy-three".