55000638000 has 720 divisors, whose sum is σ = 243819707040. Its totient is φ = 11426688000.

The previous prime is 55000637971. The next prime is 55000638013. The reversal of 55000638000 is 83600055.

It is a tau number, because it is divible by the number of its divisors (720).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9699166 + ... + 9704834.

It is an arithmetic number, because the mean of its divisors is an integer number (338638482).

Almost surely, 2^55000638000 is an apocalyptic number.

55000638000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55000638000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121909853520).

55000638000 is an abundant number, since it is smaller than the sum of its proper divisors (188819069040).

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

55000638000 is a wasteful number, since it uses less digits than its factorization.

55000638000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723 (or 5697 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 55000638000 in words is "fifty-five billion, six hundred thirty-eight thousand".