16440518809 has 8 divisors (see below), whose sum is σ = 19314735552. Its totient is φ = 13796239440.

The previous prime is 16440518777. The next prime is 16440518833. The reversal of 16440518809 is 90881504461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16440518809 - 2⁵ = 16440518777 is a prime.

It is a super-3 number, since 3×16440518809³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16440518849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57484189 + ... + 57484474.

It is an arithmetic number, because the mean of its divisors is an integer number (2414341944).

Almost surely, 2^16440518809 is an apocalyptic number.

It is an amenable number.

16440518809 is a deficient number, since it is larger than the sum of its proper divisors (2874216743).

16440518809 is a wasteful number, since it uses less digits than its factorization.

16440518809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114968687.

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 16440518809 in words is "sixteen billion, four hundred forty million, five hundred eighteen thousand, eight hundred nine".