55505728050 has 48 divisors (see below), whose sum is σ = 137670242112. Its totient is φ = 14799803200.

The previous prime is 55505727941. The next prime is 55505728051. The reversal of 55505728050 is 5082750555.

It is a junction number, because it is equal to n+sod(n) for n = 55505727993 and 55505728011.

It is not an unprimeable number, because it can be changed into a prime (55505728051) 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, 1759012 + ... + 1790288.

It is an arithmetic number, because the mean of its divisors is an integer number (2868130044).

Almost surely, 2^55505728050 is an apocalyptic number.

55505728050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55505728050 is an abundant number, since it is smaller than the sum of its proper divisors (82164514062).

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

55505728050 is a wasteful number, since it uses less digits than its factorization.

55505728050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43123 (or 43118 counting only the distinct ones).

The product of its (nonzero) digits is 350000, while the sum is 42.

The spelling of 55505728050 in words is "fifty-five billion, five hundred five million, seven hundred twenty-eight thousand, fifty".