16764233917 has 2 divisors, whose sum is σ = 16764233918. Its totient is φ = 16764233916.

The previous prime is 16764233897. The next prime is 16764233921. The reversal of 16764233917 is 71933246761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15592267161 + 1171966756 = 124869^2 + 34234^2 .

It is an emirp because it is prime and its reverse (71933246761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16764233917 - 2¹⁹ = 16763709629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16764233417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8382116958 + 8382116959.

It is an arithmetic number, because the mean of its divisors is an integer number (8382116959).

Almost surely, 2^16764233917 is an apocalyptic number.

It is an amenable number.

16764233917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16764233917 is an equidigital number, since it uses as much as digits as its factorization.

16764233917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 49.

The spelling of 16764233917 in words is "sixteen billion, seven hundred sixty-four million, two hundred thirty-three thousand, nine hundred seventeen".