16418778227 has 2 divisors, whose sum is σ = 16418778228. Its totient is φ = 16418778226.

The previous prime is 16418778191. The next prime is 16418778251. The reversal of 16418778227 is 72287781461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16418778227 - 2¹⁰ = 16418777203 is a prime.

It is not a weakly prime, because it can be changed into another prime (16418378227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8209389113 + 8209389114.

It is an arithmetic number, because the mean of its divisors is an integer number (8209389114).

Almost surely, 2^16418778227 is an apocalyptic number.

16418778227 is a deficient number, since it is larger than the sum of its proper divisors (1).

16418778227 is an equidigital number, since it uses as much as digits as its factorization.

16418778227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2107392, while the sum is 53.

The spelling of 16418778227 in words is "sixteen billion, four hundred eighteen million, seven hundred seventy-eight thousand, two hundred twenty-seven".