55227420380550 has 48 divisors (see below), whose sum is σ = 149415275506752. Its totient is φ = 13388465546400.

The previous prime is 55227420380497. The next prime is 55227420380651. The reversal of 55227420380550 is 5508302472255.

It is a self number, because there is not a number n which added to its sum of digits gives 55227420380550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16735580284 + ... + 16735583583.

It is an arithmetic number, because the mean of its divisors is an integer number (3112818239724).

Almost surely, 2^{55227420380550} is an apocalyptic number.

55227420380550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55227420380550 is an abundant number, since it is smaller than the sum of its proper divisors (94187855126202).

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

55227420380550 is a wasteful number, since it uses less digits than its factorization.

55227420380550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33471163893 (or 33471163888 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 48.

The spelling of 55227420380550 in words is "fifty-five trillion, two hundred twenty-seven billion, four hundred twenty million, three hundred eighty thousand, five hundred fifty".