16440466447 has 32 divisors (see below), whose sum is σ = 18249251328. Its totient is φ = 14762030976.

The previous prime is 16440466429. The next prime is 16440466453. The reversal of 16440466447 is 74466404461.

It is a cyclic number.

It is not a de Polignac number, because 16440466447 - 2²⁷ = 16306248719 is a prime.

It is a super-3 number, since 3×16440466447³ (a number of 32 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16440466397 and 16440466406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440466477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3034513 + ... + 3039925.

It is an arithmetic number, because the mean of its divisors is an integer number (570289104).

Almost surely, 2^16440466447 is an apocalyptic number.

16440466447 is a deficient number, since it is larger than the sum of its proper divisors (1808784881).

16440466447 is a wasteful number, since it uses less digits than its factorization.

16440466447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599.

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 16440466447 in words is "sixteen billion, four hundred forty million, four hundred sixty-six thousand, four hundred forty-seven".