16166421113 has 4 divisors (see below), whose sum is σ = 16723883940. Its totient is φ = 15608958288.

The previous prime is 16166421107. The next prime is 16166421199. The reversal of 16166421113 is 31112466161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8508771049 + 7657650064 = 92243^2 + 87508^2 .

It is a cyclic number.

It is not a de Polignac number, because 16166421113 - 2¹⁴ = 16166404729 is a prime.

It is a super-2 number, since 2×16166421113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16166421113.

It is not an unprimeable number, because it can be changed into a prime (16166421413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278731370 + ... + 278731427.

It is an arithmetic number, because the mean of its divisors is an integer number (4180970985).

Almost surely, 2^16166421113 is an apocalyptic number.

It is an amenable number.

16166421113 is a deficient number, since it is larger than the sum of its proper divisors (557462827).

16166421113 is an equidigital number, since it uses as much as digits as its factorization.

16166421113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557462826.

The product of its digits is 5184, while the sum is 32.

Adding to 16166421113 its reverse (31112466161), we get a palindrome (47278887274).

The spelling of 16166421113 in words is "sixteen billion, one hundred sixty-six million, four hundred twenty-one thousand, one hundred thirteen".