545969818 has 8 divisors (see below), whose sum is σ = 819471060. Its totient is φ = 272812800.

The previous prime is 545969779. The next prime is 545969819. The reversal of 545969818 is 818969545.

It can be written as a sum of positive squares in 2 ways, for example, as 401321089 + 144648729 = 20033^2 + 12027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×545969818³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (545969819) 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 3 ways as a sum of consecutive naturals, for example, 82053 + ... + 88456.

Almost surely, 2^545969818 is an apocalyptic number.

545969818 is a deficient number, since it is larger than the sum of its proper divisors (273501242).

545969818 is a wasteful number, since it uses less digits than its factorization.

545969818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172112.

The product of its digits is 3110400, while the sum is 55.

The square root of 545969818 is about 23365.9970469912. The cubic root of 545969818 is about 817.3151420467.

The spelling of 545969818 in words is "five hundred forty-five million, nine hundred sixty-nine thousand, eight hundred eighteen".