549212839921 has 8 divisors (see below), whose sum is σ = 573125217984. Its totient is φ = 525303258480.

The previous prime is 549212839909. The next prime is 549212840009. The reversal of 549212839921 is 129938212945.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549212839921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549212833921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292806 + ... + 1088191.

It is an arithmetic number, because the mean of its divisors is an integer number (71640652248).

Almost surely, 2^549212839921 is an apocalyptic number.

It is an amenable number.

549212839921 is a deficient number, since it is larger than the sum of its proper divisors (23912378063).

549212839921 is a wasteful number, since it uses less digits than its factorization.

549212839921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398311.

The product of its digits is 2799360, while the sum is 55.

The spelling of 549212839921 in words is "five hundred forty-nine billion, two hundred twelve million, eight hundred thirty-nine thousand, nine hundred twenty-one".