16445648642 has 8 divisors (see below), whose sum is σ = 24669122556. Its totient is φ = 8222607792.

The previous prime is 16445648603. The next prime is 16445648651. The reversal of 16445648642 is 24684654461.

16445648642 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 2 ways, for example, as 12263569081 + 4182079561 = 110741^2 + 64669^2 .

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

It is a super-2 number, since 2×16445648642² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 14528 + ... + 181940.

Almost surely, 2^16445648642 is an apocalyptic number.

16445648642 is a deficient number, since it is larger than the sum of its proper divisors (8223473914).

16445648642 is a wasteful number, since it uses less digits than its factorization.

16445648642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216532.

The product of its digits is 4423680, while the sum is 50.

The spelling of 16445648642 in words is "sixteen billion, four hundred forty-five million, six hundred forty-eight thousand, six hundred forty-two".