55055555055550 has 48 divisors (see below), whose sum is σ = 117179221612320. Its totient is φ = 18852506156160.

The previous prime is 55055555055539. The next prime is 55055555055551. The reversal of 55055555055550 is 5555055555055.

It is a super-2 number, since 2×55055555055550² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55055555055491 and 55055555055500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055555055551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98404605 + ... + 98962504.

It is an arithmetic number, because the mean of its divisors is an integer number (2441233783590).

Almost surely, 2^{55055555055550} is an apocalyptic number.

55055555055550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55055555055550 is an abundant number, since it is smaller than the sum of its proper divisors (62123666556770).

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

55055555055550 is a wasteful number, since it uses less digits than its factorization.

55055555055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197367925 (or 197367920 counting only the distinct ones).

The product of its (nonzero) digits is 48828125, while the sum is 55.

The spelling of 55055555055550 in words is "fifty-five trillion, fifty-five billion, five hundred fifty-five million, fifty-five thousand, five hundred fifty".