16042555321 has 4 divisors (see below), whose sum is σ = 17276598052. Its totient is φ = 14808512592.

The previous prime is 16042555289. The next prime is 16042555339. The reversal of 16042555321 is 12355524061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9988003600 + 6054551721 = 99940^2 + 77811^2 .

It is a cyclic number.

It is not a de Polignac number, because 16042555321 - 2⁵ = 16042555289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16042555351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617021346 + ... + 617021371.

It is an arithmetic number, because the mean of its divisors is an integer number (4319149513).

Almost surely, 2^16042555321 is an apocalyptic number.

It is an amenable number.

16042555321 is a deficient number, since it is larger than the sum of its proper divisors (1234042731).

16042555321 is a wasteful number, since it uses less digits than its factorization.

16042555321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234042730.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 16042555321 in words is "sixteen billion, forty-two million, five hundred fifty-five thousand, three hundred twenty-one".