16855617723 has 16 divisors (see below), whose sum is σ = 25686693120. Its totient is φ = 9631053216.

The previous prime is 16855617703. The next prime is 16855617739. The reversal of 16855617723 is 32771655861.

It is not a de Polignac number, because 16855617723 - 2¹⁸ = 16855355579 is a prime.

It is a super-2 number, since 2×16855617723² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16855617703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388236 + ... + 429462.

It is an arithmetic number, because the mean of its divisors is an integer number (1605418320).

Almost surely, 2^16855617723 is an apocalyptic number.

16855617723 is a deficient number, since it is larger than the sum of its proper divisors (8831075397).

16855617723 is a wasteful number, since it uses less digits than its factorization.

16855617723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60706.

The product of its digits is 2116800, while the sum is 51.

The spelling of 16855617723 in words is "sixteen billion, eight hundred fifty-five million, six hundred seventeen thousand, seven hundred twenty-three".