55111050005550 has 96 divisors (see below), whose sum is σ = 170400503741184. Its totient is φ = 11451646752000.

The previous prime is 55111050005549. The next prime is 55111050005569. The reversal of 55111050005550 is 5550005011155.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2385748191 + ... + 2385771290.

It is an arithmetic number, because the mean of its divisors is an integer number (1775005247304).

Almost surely, 2^{55111050005550} is an apocalyptic number.

55111050005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55111050005550 is an abundant number, since it is smaller than the sum of its proper divisors (115289453735634).

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

55111050005550 is a wasteful number, since it uses less digits than its factorization.

55111050005550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4771519514 (or 4771519509 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 55111050005550 in words is "fifty-five trillion, one hundred eleven billion, fifty million, five thousand, five hundred fifty".