1672321721243 has 8 divisors (see below), whose sum is σ = 1761124915200. Its totient is φ = 1583597153448.

The previous prime is 1672321721197. The next prime is 1672321721251. The reversal of 1672321721243 is 3421271232761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1672321721243 - 2¹⁰ = 1672321720219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672321721243.

It is not an unprimeable number, because it can be changed into a prime (1672321721443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19612871 + ... + 19697952.

It is an arithmetic number, because the mean of its divisors is an integer number (220140614400).

Almost surely, 2^{1672321721243} is an apocalyptic number.

1672321721243 is a deficient number, since it is larger than the sum of its proper divisors (88803193957).

1672321721243 is a wasteful number, since it uses less digits than its factorization.

1672321721243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39313081.

The product of its digits is 169344, while the sum is 41.

The spelling of 1672321721243 in words is "one trillion, six hundred seventy-two billion, three hundred twenty-one million, seven hundred twenty-one thousand, two hundred forty-three".