16516015123 has 2 divisors, whose sum is σ = 16516015124. Its totient is φ = 16516015122.

The previous prime is 16516015093. The next prime is 16516015141. The reversal of 16516015123 is 32151061561.

It is a happy number.

16516015123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (32151061561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16516015123 is a prime.

It is not a weakly prime, because it can be changed into another prime (16516015223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258007561 + 8258007562.

It is an arithmetic number, because the mean of its divisors is an integer number (8258007562).

Almost surely, 2^16516015123 is an apocalyptic number.

16516015123 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516015123 is an equidigital number, since it uses as much as digits as its factorization.

16516015123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 16516015123 its reverse (32151061561), we get a palindrome (48667076684).

The spelling of 16516015123 in words is "sixteen billion, five hundred sixteen million, fifteen thousand, one hundred twenty-three".