16771676321 has 2 divisors, whose sum is σ = 16771676322. Its totient is φ = 16771676320.

The previous prime is 16771676209. The next prime is 16771676323. The reversal of 16771676321 is 12367617761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16603611025 + 168065296 = 128855^2 + 12964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16771676321 is a prime.

It is a Sophie Germain prime.

Together with 16771676323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16771676323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8385838160 + 8385838161.

It is an arithmetic number, because the mean of its divisors is an integer number (8385838161).

Almost surely, 2^16771676321 is an apocalyptic number.

It is an amenable number.

16771676321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16771676321 is an equidigital number, since it uses as much as digits as its factorization.

16771676321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 47.

The spelling of 16771676321 in words is "sixteen billion, seven hundred seventy-one million, six hundred seventy-six thousand, three hundred twenty-one".