55551105550 has 12 divisors (see below), whose sum is σ = 103325056416. Its totient is φ = 22220442200.

The previous prime is 55551105509. The next prime is 55551105569. The reversal of 55551105550 is 5550115555.

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 5 ways as a sum of consecutive naturals, for example, 555511006 + ... + 555511105.

It is an arithmetic number, because the mean of its divisors is an integer number (8610421368).

Almost surely, 2^55551105550 is an apocalyptic number.

55551105550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55551105550 is a deficient number, since it is larger than the sum of its proper divisors (47773950866).

55551105550 is a wasteful number, since it uses less digits than its factorization.

55551105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111022123 (or 1111022118 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 55551105550 in words is "fifty-five billion, five hundred fifty-one million, one hundred five thousand, five hundred fifty".