16216420511 has 2 divisors, whose sum is σ = 16216420512. Its totient is φ = 16216420510.

The previous prime is 16216420489. The next prime is 16216420559. The reversal of 16216420511 is 11502461261.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16216420511 is a prime.

It is a super-2 number, since 2×16216420511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16216420711) 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, 8108210255 + 8108210256.

It is an arithmetic number, because the mean of its divisors is an integer number (8108210256).

Almost surely, 2^16216420511 is an apocalyptic number.

16216420511 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216420511 is an equidigital number, since it uses as much as digits as its factorization.

16216420511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 16216420511 its reverse (11502461261), we get a palindrome (27718881772).

The spelling of 16216420511 in words is "sixteen billion, two hundred sixteen million, four hundred twenty thousand, five hundred eleven".