16350204509 has 2 divisors, whose sum is σ = 16350204510. Its totient is φ = 16350204508.

The previous prime is 16350204487. The next prime is 16350204523. The reversal of 16350204509 is 90540205361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13059461284 + 3290743225 = 114278^2 + 57365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16350204509 is a prime.

It is a super-2 number, since 2×16350204509² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16350204589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8175102254 + 8175102255.

It is an arithmetic number, because the mean of its divisors is an integer number (8175102255).

Almost surely, 2^16350204509 is an apocalyptic number.

It is an amenable number.

16350204509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16350204509 is an equidigital number, since it uses as much as digits as its factorization.

16350204509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 16350204509 in words is "sixteen billion, three hundred fifty million, two hundred four thousand, five hundred nine".