55055538000 has 640 divisors, whose sum is σ = 205191866880. Its totient is φ = 14276736000.

The previous prime is 55055537993. The next prime is 55055538053. The reversal of 55055538000 is 83555055.

55055538000 is a `hidden beast` number, since 550 + 55 + 53 + 8 + 0 + 0 + 0 = 666.

It is a super-2 number, since 2×55055538000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 179333847 + ... + 179334153.

It is an arithmetic number, because the mean of its divisors is an integer number (320612292).

Almost surely, 2^55055538000 is an apocalyptic number.

55055538000 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 55055538000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102595933440).

55055538000 is an abundant number, since it is smaller than the sum of its proper divisors (150136328880).

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

55055538000 is an equidigital number, since it uses as much as digits as its factorization.

55055538000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 55055538000 in words is "fifty-five billion, fifty-five million, five hundred thirty-eight thousand".