16515730243 has 2 divisors, whose sum is σ = 16515730244. Its totient is φ = 16515730242.

The previous prime is 16515730237. The next prime is 16515730303. The reversal of 16515730243 is 34203751561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16515730243 - 2⁹ = 16515729731 is a prime.

It is not a weakly prime, because it can be changed into another prime (16515730643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8257865121 + 8257865122.

It is an arithmetic number, because the mean of its divisors is an integer number (8257865122).

Almost surely, 2^16515730243 is an apocalyptic number.

16515730243 is a deficient number, since it is larger than the sum of its proper divisors (1).

16515730243 is an equidigital number, since it uses as much as digits as its factorization.

16515730243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 16515730243 in words is "sixteen billion, five hundred fifteen million, seven hundred thirty thousand, two hundred forty-three".