16504520323 has 2 divisors, whose sum is σ = 16504520324. Its totient is φ = 16504520322.

The previous prime is 16504520317. The next prime is 16504520359. The reversal of 16504520323 is 32302540561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16504520323 is a prime.

It is not a weakly prime, because it can be changed into another prime (16504530323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252260161 + 8252260162.

It is an arithmetic number, because the mean of its divisors is an integer number (8252260162).

Almost surely, 2^16504520323 is an apocalyptic number.

16504520323 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504520323 is an equidigital number, since it uses as much as digits as its factorization.

16504520323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 16504520323 in words is "sixteen billion, five hundred four million, five hundred twenty thousand, three hundred twenty-three".