55361152220 has 192 divisors, whose sum is σ = 133249536000. Its totient is φ = 19138560000.

The previous prime is 55361152141. The next prime is 55361152229. The reversal of 55361152220 is 2225116355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55361152229) 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 63 ways as a sum of consecutive naturals, for example, 123298556 + ... + 123299004.

It is an arithmetic number, because the mean of its divisors is an integer number (694008000).

Almost surely, 2^55361152220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55361152220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66624768000).

55361152220 is an abundant number, since it is smaller than the sum of its proper divisors (77888383780).

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

55361152220 is a wasteful number, since it uses less digits than its factorization.

55361152220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 55361152220 its reverse (2225116355), we get a palindrome (57586268575).

The spelling of 55361152220 in words is "fifty-five billion, three hundred sixty-one million, one hundred fifty-two thousand, two hundred twenty".