16442667311721 has 32 divisors (see below), whose sum is σ = 25084125665280. Its totient is φ = 9385074792576.

The previous prime is 16442667311711. The next prime is 16442667311767. The reversal of 16442667311721 is 12711376624461.

16442667311721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16442667311721 - 2¹⁴ = 16442667295337 is a prime.

It is a super-3 number, since 3×16442667311721³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (16442667311711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212352205 + ... + 212429621.

It is an arithmetic number, because the mean of its divisors is an integer number (783878927040).

Almost surely, 2^{16442667311721} is an apocalyptic number.

It is an amenable number.

16442667311721 is a deficient number, since it is larger than the sum of its proper divisors (8641458353559).

16442667311721 is a wasteful number, since it uses less digits than its factorization.

16442667311721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88853.

The product of its digits is 2032128, while the sum is 51.

The spelling of 16442667311721 in words is "sixteen trillion, four hundred forty-two billion, six hundred sixty-seven million, three hundred eleven thousand, seven hundred twenty-one".