16601604912 has 80 divisors (see below), whose sum is σ = 47878860160. Its totient is φ = 5507611200.

The previous prime is 16601604893. The next prime is 16601604917. The reversal of 16601604912 is 21940610661.

16601604912 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 160 + 491 + 2 = 666.

It is a super-2 number, since 2×16601604912² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (16601604917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87 + ... + 182217.

It is an arithmetic number, because the mean of its divisors is an integer number (598485752).

Almost surely, 2^16601604912 is an apocalyptic number.

16601604912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16601604912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23939430080).

16601604912 is an abundant number, since it is smaller than the sum of its proper divisors (31277255248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16601604912 is a wasteful number, since it uses less digits than its factorization.

16601604912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182359 (or 182347 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 16601604912 in words is "sixteen billion, six hundred one million, six hundred four thousand, nine hundred twelve".