55055423430 has 144 divisors (see below), whose sum is σ = 169337647440. Its totient is φ = 12370748544.

The previous prime is 55055423413. The next prime is 55055423453. The reversal of 55055423430 is 3432455055.

55055423430 is a `hidden beast` number, since 5 + 50 + 5 + 542 + 34 + 30 = 666.

It is a Curzon number.

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 71 ways as a sum of consecutive naturals, for example, 154392 + ... + 365988.

It is an arithmetic number, because the mean of its divisors is an integer number (1175955885).

Almost surely, 2^55055423430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55055423430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84668823720).

55055423430 is an abundant number, since it is smaller than the sum of its proper divisors (114282224010).

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

55055423430 is a wasteful number, since it uses less digits than its factorization.

55055423430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211683 (or 211673 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

Adding to 55055423430 its reverse (3432455055), we get a palindrome (58487878485).

The spelling of 55055423430 in words is "fifty-five billion, fifty-five million, four hundred twenty-three thousand, four hundred thirty".