55018883855550 has 48 divisors (see below), whose sum is σ = 136447625721600. Its totient is φ = 14671617011040.

The previous prime is 55018883855549. The next prime is 55018883855563. The reversal of 55018883855550 is 5555838881055.

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, 27311851 + ... + 29257049.

It is an arithmetic number, because the mean of its divisors is an integer number (2842658869200).

Almost surely, 2^{55018883855550} is an apocalyptic number.

55018883855550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55018883855550 is an abundant number, since it is smaller than the sum of its proper divisors (81428741866050).

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

55018883855550 is a wasteful number, since it uses less digits than its factorization.

55018883855550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133777 (or 2133772 counting only the distinct ones).

The product of its (nonzero) digits is 192000000, while the sum is 66.

The spelling of 55018883855550 in words is "fifty-five trillion, eighteen billion, eight hundred eighty-three million, eight hundred fifty-five thousand, five hundred fifty".