545328891 has 12 divisors (see below), whose sum is σ = 789971832. Its totient is φ = 362502816.

The previous prime is 545328877. The next prime is 545328913. The reversal of 545328891 is 198823545.

545328891 is a `hidden beast` number, since 545 + 3 + 28 + 89 + 1 = 666.

It is not a de Polignac number, because 545328891 - 2⁹ = 545328379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545328821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84186 + ... + 90431.

It is an arithmetic number, because the mean of its divisors is an integer number (65830986).

Almost surely, 2^545328891 is an apocalyptic number.

545328891 is a deficient number, since it is larger than the sum of its proper divisors (244642941).

545328891 is a wasteful number, since it uses less digits than its factorization.

545328891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174970 (or 174967 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 545328891 is about 23352.2780687452. The cubic root of 545328891 is about 816.9951948988.

The spelling of 545328891 in words is "five hundred forty-five million, three hundred twenty-eight thousand, eight hundred ninety-one".