549663895 has 16 divisors (see below), whose sum is σ = 729699840. Its totient is φ = 394122400.

The previous prime is 549663889. The next prime is 549663899. The reversal of 549663895 is 598366945.

It is not a de Polignac number, because 549663895 - 2¹³ = 549655703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549663899) 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 15 ways as a sum of consecutive naturals, for example, 66475 + ... + 74284.

It is an arithmetic number, because the mean of its divisors is an integer number (45606240).

Almost surely, 2^549663895 is an apocalyptic number.

549663895 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

549663895 is a deficient number, since it is larger than the sum of its proper divisors (180035945).

549663895 is a wasteful number, since it uses less digits than its factorization.

549663895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140846.

The product of its digits is 6998400, while the sum is 55.

The square root of 549663895 is about 23444.9119213530. The cubic root of 549663895 is about 819.1543408496.

The spelling of 549663895 in words is "five hundred forty-nine million, six hundred sixty-three thousand, eight hundred ninety-five".