55561056005550 has 96 divisors (see below), whose sum is σ = 142545785057280. Its totient is φ = 14305080496000.

The previous prime is 55561056005537. The next prime is 55561056005551. The reversal of 55561056005550 is 5550065016555.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55561056005550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561056005551) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 278957299 + ... + 279156401.

It is an arithmetic number, because the mean of its divisors is an integer number (1484851927680).

Almost surely, 2^{55561056005550} is an apocalyptic number.

55561056005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55561056005550 is an abundant number, since it is smaller than the sum of its proper divisors (86984729051730).

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

55561056005550 is a wasteful number, since it uses less digits than its factorization.

55561056005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263298 (or 263293 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 55561056005550 in words is "fifty-five trillion, five hundred sixty-one billion, fifty-six million, five thousand, five hundred fifty".