16685616123 has 96 divisors (see below), whose sum is σ = 27398891520. Its totient is φ = 9698330880.

The previous prime is 16685616113. The next prime is 16685616131. The reversal of 16685616123 is 32161658661.

16685616123 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 5 + 616 + 1 + 23 = 666.

It is not a de Polignac number, because 16685616123 - 2⁵ = 16685616091 is a prime.

It is a super-2 number, since 2×16685616123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16685616113) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 84698461 + ... + 84698657.

It is an arithmetic number, because the mean of its divisors is an integer number (285405120).

Almost surely, 2^16685616123 is an apocalyptic number.

16685616123 is a deficient number, since it is larger than the sum of its proper divisors (10713275397).

16685616123 is a wasteful number, since it uses less digits than its factorization.

16685616123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 534 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 16685616123 in words is "sixteen billion, six hundred eighty-five million, six hundred sixteen thousand, one hundred twenty-three".