55538780000 has 120 divisors (see below), whose sum is σ = 149055568200. Its totient is φ = 20195840000.

The previous prime is 55538779991. The next prime is 55538780039. The reversal of 55538780000 is 8783555.

It is a self number, because there is not a number n which added to its sum of digits gives 55538780000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 93776 + ... + 346224.

It is an arithmetic number, because the mean of its divisors is an integer number (1242129735).

Almost surely, 2^55538780000 is an apocalyptic number.

55538780000 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 55538780000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74527784100).

55538780000 is an abundant number, since it is smaller than the sum of its proper divisors (93516788200).

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

55538780000 is a wasteful number, since it uses less digits than its factorization.

55538780000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252490 (or 252467 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 41.

It can be divided in two parts, 55538 and 780000, that added together give a palindrome (835538).

The spelling of 55538780000 in words is "fifty-five billion, five hundred thirty-eight million, seven hundred eighty thousand".