16516885237 has 2 divisors, whose sum is σ = 16516885238. Its totient is φ = 16516885236.

The previous prime is 16516885223. The next prime is 16516885261. The reversal of 16516885237 is 73258861561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16422678801 + 94206436 = 128151^2 + 9706^2 .

It is an emirp because it is prime and its reverse (73258861561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16516885237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16516885207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258442618 + 8258442619.

It is an arithmetic number, because the mean of its divisors is an integer number (8258442619).

Almost surely, 2^16516885237 is an apocalyptic number.

It is an amenable number.

16516885237 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516885237 is an equidigital number, since it uses as much as digits as its factorization.

16516885237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The spelling of 16516885237 in words is "sixteen billion, five hundred sixteen million, eight hundred eighty-five thousand, two hundred thirty-seven".