16671976613 has 4 divisors (see below), whose sum is σ = 16725242028. Its totient is φ = 16618711200.

The previous prime is 16671976609. The next prime is 16671976667. The reversal of 16671976613 is 31667917661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31667917661 = 31 ⋅1021545731.

It can be written as a sum of positive squares in 2 ways, for example, as 7642606084 + 9029370529 = 87422^2 + 95023^2 .

It is a cyclic number.

It is not a de Polignac number, because 16671976613 - 2² = 16671976609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671973613) 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, 26632238 + ... + 26632863.

It is an arithmetic number, because the mean of its divisors is an integer number (4181310507).

Almost surely, 2^16671976613 is an apocalyptic number.

It is an amenable number.

16671976613 is a deficient number, since it is larger than the sum of its proper divisors (53265415).

16671976613 is an equidigital number, since it uses as much as digits as its factorization.

16671976613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53265414.

The product of its digits is 1714608, while the sum is 53.

The spelling of 16671976613 in words is "sixteen billion, six hundred seventy-one million, nine hundred seventy-six thousand, six hundred thirteen".