16373219509 has 2 divisors, whose sum is σ = 16373219510. Its totient is φ = 16373219508.

The previous prime is 16373219491. The next prime is 16373219587. The reversal of 16373219509 is 90591237361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15105147409 + 1268072100 = 122903^2 + 35610^2 .

It is a cyclic number.

It is not a de Polignac number, because 16373219509 - 2¹⁵ = 16373186741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16373219609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8186609754 + 8186609755.

It is an arithmetic number, because the mean of its divisors is an integer number (8186609755).

Almost surely, 2^16373219509 is an apocalyptic number.

It is an amenable number.

16373219509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16373219509 is an equidigital number, since it uses as much as digits as its factorization.

16373219509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 46.

The spelling of 16373219509 in words is "sixteen billion, three hundred seventy-three million, two hundred nineteen thousand, five hundred nine".