16442667640573 has 4 divisors (see below), whose sum is σ = 16562687112540. Its totient is φ = 16322648168608.

The previous prime is 16442667640559. The next prime is 16442667640759. The reversal of 16442667640573 is 37504676624461.

It is a happy number.

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 6334095998169 + 10108571642404 = 2516763^2 + 3179398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16442667640573 is a prime.

It is a super-3 number, since 3×16442667640573³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442667640523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60009735778 + ... + 60009736051.

It is an arithmetic number, because the mean of its divisors is an integer number (4140671778135).

Almost surely, 2^{16442667640573} is an apocalyptic number.

It is an amenable number.

16442667640573 is a deficient number, since it is larger than the sum of its proper divisors (120019471967).

16442667640573 is a wasteful number, since it uses less digits than its factorization.

16442667640573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120019471966.

The product of its (nonzero) digits is 121927680, while the sum is 61.

The spelling of 16442667640573 in words is "sixteen trillion, four hundred forty-two billion, six hundred sixty-seven million, six hundred forty thousand, five hundred seventy-three".