16505555442 has 16 divisors (see below), whose sum is σ = 34952941152. Its totient is φ = 5178213440.

The previous prime is 16505555419. The next prime is 16505555449. The reversal of 16505555442 is 24455550561.

It is a junction number, because it is equal to n+sod(n) for n = 16505555394 and 16505555403.

It is not an unprimeable number, because it can be changed into a prime (16505555449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80909484 + ... + 80909687.

It is an arithmetic number, because the mean of its divisors is an integer number (2184558822).

Almost surely, 2^16505555442 is an apocalyptic number.

16505555442 is an abundant number, since it is smaller than the sum of its proper divisors (18447385710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16505555442 is a wasteful number, since it uses less digits than its factorization.

16505555442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161819193.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 16505555442 in words is "sixteen billion, five hundred five million, five hundred fifty-five thousand, four hundred forty-two".