16722920717 has 2 divisors, whose sum is σ = 16722920718. Its totient is φ = 16722920716.

The previous prime is 16722920653. The next prime is 16722920761. The reversal of 16722920717 is 71702922761.

It is an a-pointer prime, because the next prime (16722920761) can be obtained adding 16722920717 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9371401636 + 7351519081 = 96806^2 + 85741^2 .

It is a cyclic number.

It is not a de Polignac number, because 16722920717 - 2⁶ = 16722920653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16722980717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361460358 + 8361460359.

It is an arithmetic number, because the mean of its divisors is an integer number (8361460359).

Almost surely, 2^16722920717 is an apocalyptic number.

It is an amenable number.

16722920717 is a deficient number, since it is larger than the sum of its proper divisors (1).

16722920717 is an equidigital number, since it uses as much as digits as its factorization.

16722920717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 44.

The spelling of 16722920717 in words is "sixteen billion, seven hundred twenty-two million, nine hundred twenty thousand, seven hundred seventeen".