16731166212 has 18 divisors (see below), whose sum is σ = 42292670238. Its totient is φ = 5577055392.

The previous prime is 16731166201. The next prime is 16731166229. The reversal of 16731166212 is 21266113761.

16731166212 is a `hidden beast` number, since 16 + 7 + 3 + 1 + 16 + 621 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10083373056 + 6647793156 = 100416^2 + 81534^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 464754617 = 16731166212 / (1 + 6 + 7 + 3 + 1 + 1 + 6 + 6 + 2 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232377273 + ... + 232377344.

It is an arithmetic number, because the mean of its divisors is an integer number (2349592791).

Almost surely, 2^16731166212 is an apocalyptic number.

16731166212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16731166212 is an abundant number, since it is smaller than the sum of its proper divisors (25561504026).

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

16731166212 is a wasteful number, since it uses less digits than its factorization.

16731166212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464754627 (or 464754622 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

Adding to 16731166212 its reverse (21266113761), we get a palindrome (37997279973).

The spelling of 16731166212 in words is "sixteen billion, seven hundred thirty-one million, one hundred sixty-six thousand, two hundred twelve".