16442072236621 has 4 divisors (see below), whose sum is σ = 16498188524412. Its totient is φ = 16385955948832.

The previous prime is 16442072236573. The next prime is 16442072236631. The reversal of 16442072236621 is 12663227024461.

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 16119662904900 + 322409331721 = 4014930^2 + 567811^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442072236621 - 2⁷ = 16442072236493 is a prime.

It is a super-3 number, since 3×16442072236621³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442072236631) 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, 28058143456 + ... + 28058144041.

It is an arithmetic number, because the mean of its divisors is an integer number (4124547131103).

Almost surely, 2^{16442072236621} is an apocalyptic number.

It is an amenable number.

16442072236621 is a deficient number, since it is larger than the sum of its proper divisors (56116287791).

16442072236621 is an equidigital number, since it uses as much as digits as its factorization.

16442072236621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56116287790.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 16442072236621 in words is "sixteen trillion, four hundred forty-two billion, seventy-two million, two hundred thirty-six thousand, six hundred twenty-one".