873573661921 has 24 divisors (see below), whose sum is σ = 902037558240. Its totient is φ = 845498001600.

The previous prime is 873573661913. The next prime is 873573661969. The reversal of 873573661921 is 129166375378.

It is not a de Polignac number, because 873573661921 - 2³ = 873573661913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873573661901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 800708586 + ... + 800709676.

It is an arithmetic number, because the mean of its divisors is an integer number (37584898260).

Almost surely, 2^873573661921 is an apocalyptic number.

It is an amenable number.

873573661921 is a deficient number, since it is larger than the sum of its proper divisors (28463896319).

873573661921 is a wasteful number, since it uses less digits than its factorization.

873573661921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1738 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 58.

The spelling of 873573661921 in words is "eight hundred seventy-three billion, five hundred seventy-three million, six hundred sixty-one thousand, nine hundred twenty-one".