55641386868 has 12 divisors (see below), whose sum is σ = 129829902720. Its totient is φ = 18547128952.

The previous prime is 55641386849. The next prime is 55641386881. The reversal of 55641386868 is 86868314655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318391108 + ... + 2318391131.

It is an arithmetic number, because the mean of its divisors is an integer number (10819158560).

Almost surely, 2^55641386868 is an apocalyptic number.

It is an amenable number.

55641386868 is an abundant number, since it is smaller than the sum of its proper divisors (74188515852).

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

55641386868 is a wasteful number, since it uses less digits than its factorization.

55641386868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636782246 (or 4636782244 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 60.

The spelling of 55641386868 in words is "fifty-five billion, six hundred forty-one million, three hundred eighty-six thousand, eight hundred sixty-eight".