16447399318 has 16 divisors (see below), whose sum is σ = 28199532960. Its totient is φ = 7047887616.

The previous prime is 16447399313. The next prime is 16447399327. The reversal of 16447399318 is 81399374461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16447399313) 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 in 7 ways as a sum of consecutive naturals, for example, 24048 + ... + 182956.

It is an arithmetic number, because the mean of its divisors is an integer number (1762470810).

Almost surely, 2^16447399318 is an apocalyptic number.

16447399318 is a deficient number, since it is larger than the sum of its proper divisors (11752133642).

16447399318 is a wasteful number, since it uses less digits than its factorization.

16447399318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166311.

The product of its digits is 3919104, while the sum is 55.

The spelling of 16447399318 in words is "sixteen billion, four hundred forty-seven million, three hundred ninety-nine thousand, three hundred eighteen".