55550005550 has 48 divisors (see below), whose sum is σ = 111420076992. Its totient is φ = 20483280000.

The previous prime is 55550005543. The next prime is 55550005583. The reversal of 55550005550 is 5550005555.

It is a self number, because there is not a number n which added to its sum of digits gives 55550005550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431252 + ... + 545048.

It is an arithmetic number, because the mean of its divisors is an integer number (2321251604).

Almost surely, 2^55550005550 is an apocalyptic number.

55550005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55550005550 is an abundant number, since it is smaller than the sum of its proper divisors (55870071442).

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

55550005550 is a wasteful number, since it uses less digits than its factorization.

55550005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114573 (or 114568 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 35.

The spelling of 55550005550 in words is "fifty-five billion, five hundred fifty million, five thousand, five hundred fifty".