545964191 has 4 divisors (see below), whose sum is σ = 548248800. Its totient is φ = 543679584.

The previous prime is 545964151. The next prime is 545964217. The reversal of 545964191 is 191469545.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 545964191 - 2⁶ = 545964127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545964101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141946 + ... + 1142423.

It is an arithmetic number, because the mean of its divisors is an integer number (137062200).

Almost surely, 2^545964191 is an apocalyptic number.

545964191 is a deficient number, since it is larger than the sum of its proper divisors (2284609).

545964191 is a wasteful number, since it uses less digits than its factorization.

545964191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284608.

The product of its digits is 194400, while the sum is 44.

The square root of 545964191 is about 23365.8766366683. The cubic root of 545964191 is about 817.3123341698.

The spelling of 545964191 in words is "five hundred forty-five million, nine hundred sixty-four thousand, one hundred ninety-one".