16211647973 has 2 divisors, whose sum is σ = 16211647974. Its totient is φ = 16211647972.

The previous prime is 16211647891. The next prime is 16211647987. The reversal of 16211647973 is 37974611261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12298144609 + 3913503364 = 110897^2 + 62558^2 .

It is a cyclic number.

It is not a de Polignac number, because 16211647973 - 2¹⁰ = 16211646949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16211647993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8105823986 + 8105823987.

It is an arithmetic number, because the mean of its divisors is an integer number (8105823987).

Almost surely, 2^16211647973 is an apocalyptic number.

It is an amenable number.

16211647973 is a deficient number, since it is larger than the sum of its proper divisors (1).

16211647973 is an equidigital number, since it uses as much as digits as its factorization.

16211647973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The spelling of 16211647973 in words is "sixteen billion, two hundred eleven million, six hundred forty-seven thousand, nine hundred seventy-three".