545904985 has 4 divisors (see below), whose sum is σ = 655085988. Its totient is φ = 436723984.

The previous prime is 545904973. The next prime is 545904991. The reversal of 545904985 is 589409545.

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

It can be written as a sum of positive squares in 2 ways, for example, as 313006864 + 232898121 = 17692^2 + 15261^2 .

It is a cyclic number.

It is not a de Polignac number, because 545904985 - 2²⁹ = 9034073 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54590494 + ... + 54590503.

It is an arithmetic number, because the mean of its divisors is an integer number (163771497).

Almost surely, 2^545904985 is an apocalyptic number.

It is an amenable number.

545904985 is a deficient number, since it is larger than the sum of its proper divisors (109181003).

545904985 is a wasteful number, since it uses less digits than its factorization.

545904985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109181002.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The square root of 545904985 is about 23364.6096693268. The cubic root of 545904985 is about 817.2827891654.

The spelling of 545904985 in words is "five hundred forty-five million, nine hundred four thousand, nine hundred eighty-five".