549112783820 has 48 divisors (see below), whose sum is σ = 1220642105760. Its totient is φ = 207139247616.

The previous prime is 549112783819. The next prime is 549112783829. The reversal of 549112783820 is 28387211945.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (549112783829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10983737 + ... + 11033616.

It is an arithmetic number, because the mean of its divisors is an integer number (25430043870).

Almost surely, 2^549112783820 is an apocalyptic number.

It is an amenable number.

549112783820 is an abundant number, since it is smaller than the sum of its proper divisors (671529321940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

549112783820 is a wasteful number, since it uses less digits than its factorization.

549112783820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22017434 (or 22017432 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 549112783820 in words is "five hundred forty-nine billion, one hundred twelve million, seven hundred eighty-three thousand, eight hundred twenty".