16442660645 has 8 divisors (see below), whose sum is σ = 19750008600. Its totient is φ = 13141584640.

The previous prime is 16442660603. The next prime is 16442660659. The reversal of 16442660645 is 54606624461.

16442660645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5294890756 + 11147769889 = 72766^2 + 105583^2 .

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

It is not a de Polignac number, because 16442660645 - 2¹⁴ = 16442644261 is a prime.

It is a super-3 number, since 3×16442660645³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16442660596 and 16442660605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562216 + ... + 1572705.

It is an arithmetic number, because the mean of its divisors is an integer number (2468751075).

Almost surely, 2^16442660645 is an apocalyptic number.

It is an amenable number.

16442660645 is a deficient number, since it is larger than the sum of its proper divisors (3307347955).

16442660645 is a wasteful number, since it uses less digits than its factorization.

16442660645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135975.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 16442660645 in words is "sixteen billion, four hundred forty-two million, six hundred sixty thousand, six hundred forty-five".