55505656550 has 48 divisors (see below), whose sum is σ = 107855096832. Its totient is φ = 21227143200.

The previous prime is 55505656529. The next prime is 55505656561. The reversal of 55505656550 is 5565650555.

It is a junction number, because it is equal to n+sod(n) for n = 55505656495 and 55505656504.

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, 87074 + ... + 344373.

It is an arithmetic number, because the mean of its divisors is an integer number (2246981184).

Almost surely, 2^55505656550 is an apocalyptic number.

55505656550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55505656550 is a deficient number, since it is larger than the sum of its proper divisors (52349440282).

55505656550 is a wasteful number, since it uses less digits than its factorization.

55505656550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431573 (or 431568 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 47.

The spelling of 55505656550 in words is "fifty-five billion, five hundred five million, six hundred fifty-six thousand, five hundred fifty".