673128228591 has 64 divisors (see below), whose sum is σ = 1232716979200. Its totient is φ = 353505886848.

The previous prime is 673128228589. The next prime is 673128228607. The reversal of 673128228591 is 195822821376.

673128228591 is a `hidden beast` number, since 6 + 7 + 3 + 1 + 28 + 2 + 28 + 591 = 666.

It is not a de Polignac number, because 673128228591 - 2¹ = 673128228589 is a prime.

It is a super-2 number, since 2×673128228591² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673128228571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35521 + ... + 1160826.

It is an arithmetic number, because the mean of its divisors is an integer number (19261202800).

Almost surely, 2^673128228591 is an apocalyptic number.

673128228591 is a deficient number, since it is larger than the sum of its proper divisors (559588750609).

673128228591 is a wasteful number, since it uses less digits than its factorization.

673128228591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196605 (or 1196599 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 673128228591 in words is "six hundred seventy-three billion, one hundred twenty-eight million, two hundred twenty-eight thousand, five hundred ninety-one".