16005206412 has 72 divisors (see below), whose sum is σ = 43821798384. Its totient is φ = 4896187776.

The previous prime is 16005206407. The next prime is 16005206447. The reversal of 16005206412 is 21460250061.

16005206412 is a `hidden beast` number, since 1 + 600 + 52 + 0 + 6 + 4 + 1 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17878 + ... + 179805.

Almost surely, 2^16005206412 is an apocalyptic number.

16005206412 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 16005206412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21910899192).

16005206412 is an abundant number, since it is smaller than the sum of its proper divisors (27816591972).

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

16005206412 is a wasteful number, since it uses less digits than its factorization.

16005206412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197879 (or 197874 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 16005206412 its reverse (21460250061), we get a palindrome (37465456473).

The spelling of 16005206412 in words is "sixteen billion, five million, two hundred six thousand, four hundred twelve".