549339309618 has 32 divisors (see below), whose sum is σ = 1198607706432. Its totient is φ = 166459622400.

The previous prime is 549339309593. The next prime is 549339309619. The reversal of 549339309618 is 816903933945.

It is not an unprimeable number, because it can be changed into a prime (549339309619) 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, 1584258 + ... + 1899618.

It is an arithmetic number, because the mean of its divisors is an integer number (37456490826).

Almost surely, 2^549339309618 is an apocalyptic number.

549339309618 is an abundant number, since it is smaller than the sum of its proper divisors (649268396814).

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

549339309618 is a wasteful number, since it uses less digits than its factorization.

549339309618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341770.

The product of its (nonzero) digits is 18895680, while the sum is 60.

The spelling of 549339309618 in words is "five hundred forty-nine billion, three hundred thirty-nine million, three hundred nine thousand, six hundred eighteen".