545448491 has 4 divisors (see below), whose sum is σ = 623369712. Its totient is φ = 467527272.

The previous prime is 545448467. The next prime is 545448509. The reversal of 545448491 is 194844545.

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 545448491 - 2¹⁰ = 545447467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545448091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38960600 + ... + 38960613.

It is an arithmetic number, because the mean of its divisors is an integer number (155842428).

Almost surely, 2^545448491 is an apocalyptic number.

545448491 is a deficient number, since it is larger than the sum of its proper divisors (77921221).

545448491 is an equidigital number, since it uses as much as digits as its factorization.

545448491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77921220.

The product of its digits is 460800, while the sum is 44.

The square root of 545448491 is about 23354.8387063580. The cubic root of 545448491 is about 817.0549175631.

The spelling of 545448491 in words is "five hundred forty-five million, four hundred forty-eight thousand, four hundred ninety-one".