16438044355 has 8 divisors (see below), whose sum is σ = 19745017200. Its totient is φ = 13137526176.

The previous prime is 16438044349. The next prime is 16438044391. The reversal of 16438044355 is 55344083461.

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 16438044355 - 2⁵ = 16438044323 is a prime.

It is a super-5 number, since 5×16438044355⁵ (a number of 52 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608060 + ... + 1618249.

It is an arithmetic number, because the mean of its divisors is an integer number (2468127150).

Almost surely, 2^16438044355 is an apocalyptic number.

16438044355 is a deficient number, since it is larger than the sum of its proper divisors (3306972845).

16438044355 is a wasteful number, since it uses less digits than its factorization.

16438044355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227333.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 16438044355 in words is "sixteen billion, four hundred thirty-eight million, forty-four thousand, three hundred fifty-five".