16399945522 has 8 divisors (see below), whose sum is σ = 24600477996. Its totient is φ = 8199786192.

The previous prime is 16399945519. The next prime is 16399945559. The reversal of 16399945522 is 22554999361.

16399945522 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 16384256001 + 15689521 = 128001^2 + 3961^2 .

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

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, 83908 + ... + 199600.

Almost surely, 2^16399945522 is an apocalyptic number.

16399945522 is a deficient number, since it is larger than the sum of its proper divisors (8200532474).

16399945522 is a wasteful number, since it uses less digits than its factorization.

16399945522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186572.

The product of its digits is 5248800, while the sum is 55.

The spelling of 16399945522 in words is "sixteen billion, three hundred ninety-nine million, nine hundred forty-five thousand, five hundred twenty-two".