1721472885867 has 16 divisors (see below), whose sum is σ = 2648664711680. Its totient is φ = 974148316992.

The previous prime is 1721472885799. The next prime is 1721472885871. The reversal of 1721472885867 is 7685882741271.

It is not a de Polignac number, because 1721472885867 - 2¹⁰ = 1721472884843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1721472885798 and 1721472885807.

It is not an unprimeable number, because it can be changed into a prime (1721472885877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397934242 + ... + 397938567.

It is an arithmetic number, because the mean of its divisors is an integer number (165541544480).

Almost surely, 2^{1721472885867} is an apocalyptic number.

1721472885867 is a deficient number, since it is larger than the sum of its proper divisors (927191825813).

1721472885867 is a wasteful number, since it uses less digits than its factorization.

1721472885867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795872922.

The product of its digits is 84295680, while the sum is 66.

The spelling of 1721472885867 in words is "one trillion, seven hundred twenty-one billion, four hundred seventy-two million, eight hundred eighty-five thousand, eight hundred sixty-seven".