16438089943 has 24 divisors (see below), whose sum is σ = 18557407008. Its totient is φ = 14541120000.

The previous prime is 16438089919. The next prime is 16438089959. The reversal of 16438089943 is 34998083461.

It is not a de Polignac number, because 16438089943 - 2¹⁷ = 16437958871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16438081943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1985230 + ... + 1993492.

It is an arithmetic number, because the mean of its divisors is an integer number (773225292).

Almost surely, 2^16438089943 is an apocalyptic number.

16438089943 is a deficient number, since it is larger than the sum of its proper divisors (2119317065).

16438089943 is a wasteful number, since it uses less digits than its factorization.

16438089943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8727 (or 8716 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 16438089943 in words is "sixteen billion, four hundred thirty-eight million, eighty-nine thousand, nine hundred forty-three".