16621615223 has 2 divisors, whose sum is σ = 16621615224. Its totient is φ = 16621615222.

The previous prime is 16621615181. The next prime is 16621615243. The reversal of 16621615223 is 32251612661.

It is a strong prime.

It is an emirp because it is prime and its reverse (32251612661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16621615223 - 2¹⁴ = 16621598839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16621615243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8310807611 + 8310807612.

It is an arithmetic number, because the mean of its divisors is an integer number (8310807612).

Almost surely, 2^16621615223 is an apocalyptic number.

16621615223 is a deficient number, since it is larger than the sum of its proper divisors (1).

16621615223 is an equidigital number, since it uses as much as digits as its factorization.

16621615223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The spelling of 16621615223 in words is "sixteen billion, six hundred twenty-one million, six hundred fifteen thousand, two hundred twenty-three".