55120544250 has 32 divisors (see below), whose sum is σ = 137580880320. Its totient is φ = 14698811600.

The previous prime is 55120544221. The next prime is 55120544273. The reversal of 55120544250 is 5244502155.

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 15 ways as a sum of consecutive naturals, for example, 36746280 + ... + 36747779.

It is an arithmetic number, because the mean of its divisors is an integer number (4299402510).

Almost surely, 2^55120544250 is an apocalyptic number.

55120544250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55120544250 is an abundant number, since it is smaller than the sum of its proper divisors (82460336070).

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

55120544250 is a wasteful number, since it uses less digits than its factorization.

55120544250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73494079 (or 73494069 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The spelling of 55120544250 in words is "fifty-five billion, one hundred twenty million, five hundred forty-four thousand, two hundred fifty".