55043450172 has 18 divisors (see below), whose sum is σ = 139137610248. Its totient is φ = 18347816712.

The previous prime is 55043450171. The next prime is 55043450183. The reversal of 55043450172 is 27105434055.

55043450172 is a `hidden beast` number, since 5 + 5 + 0 + 434 + 50 + 172 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1528984727 = 55043450172 / (5 + 5 + 0 + 4 + 3 + 4 + 5 + 0 + 1 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55043450171) 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 5 ways as a sum of consecutive naturals, for example, 764492328 + ... + 764492399.

It is an arithmetic number, because the mean of its divisors is an integer number (7729867236).

Almost surely, 2^55043450172 is an apocalyptic number.

It is an amenable number.

55043450172 is an abundant number, since it is smaller than the sum of its proper divisors (84094160076).

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

55043450172 is a wasteful number, since it uses less digits than its factorization.

55043450172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528984737 (or 1528984732 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The spelling of 55043450172 in words is "fifty-five billion, forty-three million, four hundred fifty thousand, one hundred seventy-two".