16585273861 has 4 divisors (see below), whose sum is σ = 17861064172. Its totient is φ = 15309483552.

The previous prime is 16585273853. The next prime is 16585273919. The reversal of 16585273861 is 16837258561.

16585273861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16837258561 = 8443 ⋅1994227.

It can be written as a sum of positive squares in 2 ways, for example, as 1898257761 + 14687016100 = 43569^2 + 121190^2 .

It is a cyclic number.

It is not a de Polignac number, because 16585273861 - 2³ = 16585273853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16585273799 and 16585273808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16585271861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637895136 + ... + 637895161.

It is an arithmetic number, because the mean of its divisors is an integer number (4465266043).

Almost surely, 2^16585273861 is an apocalyptic number.

It is an amenable number.

16585273861 is a deficient number, since it is larger than the sum of its proper divisors (1275790311).

16585273861 is a wasteful number, since it uses less digits than its factorization.

16585273861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275790310.

The product of its digits is 2419200, while the sum is 52.

The spelling of 16585273861 in words is "sixteen billion, five hundred eighty-five million, two hundred seventy-three thousand, eight hundred sixty-one".