16442321771 has 4 divisors (see below), whose sum is σ = 16443451032. Its totient is φ = 16441192512.

The previous prime is 16442321767. The next prime is 16442321807. The reversal of 16442321771 is 17712324461.

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

It is a cyclic number.

It is not a de Polignac number, because 16442321771 - 2² = 16442321767 is a prime.

It is a super-3 number, since 3×16442321771³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442321711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542501 + ... + 572006.

It is an arithmetic number, because the mean of its divisors is an integer number (4110862758).

Almost surely, 2^16442321771 is an apocalyptic number.

16442321771 is a deficient number, since it is larger than the sum of its proper divisors (1129261).

16442321771 is a wasteful number, since it uses less digits than its factorization.

16442321771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129260.

The product of its digits is 56448, while the sum is 38.

The spelling of 16442321771 in words is "sixteen billion, four hundred forty-two million, three hundred twenty-one thousand, seven hundred seventy-one".