216465566907 has 4 divisors (see below), whose sum is σ = 288620755880. Its totient is φ = 144310377936.

The previous prime is 216465566857. The next prime is 216465566921. The reversal of 216465566907 is 709665564612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 216465566907 - 2⁶ = 216465566843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216465566987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36077594482 + ... + 36077594487.

It is an arithmetic number, because the mean of its divisors is an integer number (72155188970).

Almost surely, 2^216465566907 is an apocalyptic number.

216465566907 is a deficient number, since it is larger than the sum of its proper divisors (72155188973).

216465566907 is an equidigital number, since it uses as much as digits as its factorization.

216465566907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72155188972.

The product of its (nonzero) digits is 16329600, while the sum is 57.

The spelling of 216465566907 in words is "two hundred sixteen billion, four hundred sixty-five million, five hundred sixty-six thousand, nine hundred seven".