16201216613 has 2 divisors, whose sum is σ = 16201216614. Its totient is φ = 16201216612.

The previous prime is 16201216567. The next prime is 16201216693. The reversal of 16201216613 is 31661210261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15972662689 + 228553924 = 126383^2 + 15118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16201216613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16201216693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8100608306 + 8100608307.

It is an arithmetic number, because the mean of its divisors is an integer number (8100608307).

Almost surely, 2^16201216613 is an apocalyptic number.

It is an amenable number.

16201216613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16201216613 is an equidigital number, since it uses as much as digits as its factorization.

16201216613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 16201216613 its reverse (31661210261), we get a palindrome (47862426874).

The spelling of 16201216613 in words is "sixteen billion, two hundred one million, two hundred sixteen thousand, six hundred thirteen".