16442664001697 has 4 divisors (see below), whose sum is σ = 16526129301396. Its totient is φ = 16359198702000.

The previous prime is 16442664001669. The next prime is 16442664001723. The reversal of 16442664001697 is 79610046624461.

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 14693721231121 + 1748942770576 = 3833239^2 + 1322476^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442664001697 - 2¹⁰ = 16442664000673 is a prime.

It is a super-3 number, since 3×16442664001697³ (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 not an unprimeable number, because it can be changed into a prime (16442664001607) 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, 41732649554 + ... + 41732649947.

It is an arithmetic number, because the mean of its divisors is an integer number (4131532325349).

Almost surely, 2^{16442664001697} is an apocalyptic number.

It is an amenable number.

16442664001697 is a deficient number, since it is larger than the sum of its proper divisors (83465299699).

16442664001697 is an equidigital number, since it uses as much as digits as its factorization.

16442664001697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83465299698.

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 16442664001697 in words is "sixteen trillion, four hundred forty-two billion, six hundred sixty-four million, one thousand, six hundred ninety-seven".