161516500499 has 2 divisors, whose sum is σ = 161516500500. Its totient is φ = 161516500498.

The previous prime is 161516500459. The next prime is 161516500501. The reversal of 161516500499 is 994005615161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161516500499 - 2¹² = 161516496403 is a prime.

Together with 161516500501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161516500459) 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, 80758250249 + 80758250250.

It is an arithmetic number, because the mean of its divisors is an integer number (80758250250).

Almost surely, 2^161516500499 is an apocalyptic number.

161516500499 is a deficient number, since it is larger than the sum of its proper divisors (1).

161516500499 is an equidigital number, since it uses as much as digits as its factorization.

161516500499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 161516500499 in words is "one hundred sixty-one billion, five hundred sixteen million, five hundred thousand, four hundred ninety-nine".