16440545663 has 8 divisors (see below), whose sum is σ = 17311038720. Its totient is φ = 15570572760.

The previous prime is 16440545581. The next prime is 16440545677. The reversal of 16440545663 is 36654504461.

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 16440545663 - 2¹⁶ = 16440480127 is a prime.

It is a super-3 number, since 3×16440545663³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440542663) 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, 64295 + ... + 192392.

It is an arithmetic number, because the mean of its divisors is an integer number (2163879840).

Almost surely, 2^16440545663 is an apocalyptic number.

16440545663 is a deficient number, since it is larger than the sum of its proper divisors (870493057).

16440545663 is a wasteful number, since it uses less digits than its factorization.

16440545663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260077.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 16440545663 in words is "sixteen billion, four hundred forty million, five hundred forty-five thousand, six hundred sixty-three".