16166444513 has 8 divisors (see below), whose sum is σ = 16259279400. Its totient is φ = 16073648640.

The previous prime is 16166444467. The next prime is 16166444533. The reversal of 16166444513 is 31544466161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22963264 + 16143481249 = 4792^2 + 127057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16166444513 - 2⁶ = 16166444449 is a prime.

It is a super-2 number, since 2×16166444513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16166444533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378631 + ... + 1390307.

It is an arithmetic number, because the mean of its divisors is an integer number (2032409925).

Almost surely, 2^16166444513 is an apocalyptic number.

It is an amenable number.

16166444513 is a deficient number, since it is larger than the sum of its proper divisors (92834887).

16166444513 is a wasteful number, since it uses less digits than its factorization.

16166444513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19507.

The product of its digits is 207360, while the sum is 41.

The spelling of 16166444513 in words is "sixteen billion, one hundred sixty-six million, four hundred forty-four thousand, five hundred thirteen".