55056561550 has 48 divisors (see below), whose sum is σ = 103009781952. Its totient is φ = 21892982400.

The previous prime is 55056561533. The next prime is 55056561557. The reversal of 55056561550 is 5516565055.

It is a junction number, because it is equal to n+sod(n) for n = 55056561497 and 55056561506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55056561557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6380539 + ... + 6389161.

It is an arithmetic number, because the mean of its divisors is an integer number (2146037124).

Almost surely, 2^55056561550 is an apocalyptic number.

55056561550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55056561550 is a deficient number, since it is larger than the sum of its proper divisors (47953220402).

55056561550 is a wasteful number, since it uses less digits than its factorization.

55056561550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9373 (or 9368 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 55056561550 in words is "fifty-five billion, fifty-six million, five hundred sixty-one thousand, five hundred fifty".