55021563120 has 160 divisors (see below), whose sum is σ = 179083537920. Its totient is φ = 13954913280.

The previous prime is 55021563109. The next prime is 55021563137. The reversal of 55021563120 is 2136512055.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 407325 + ... + 525315.

It is an arithmetic number, because the mean of its divisors is an integer number (1119272112).

Almost surely, 2^55021563120 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 55021563120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89541768960).

55021563120 is an abundant number, since it is smaller than the sum of its proper divisors (124061974800).

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

55021563120 is a wasteful number, since it uses less digits than its factorization.

55021563120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118103 (or 118097 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 55021563120 in words is "fifty-five billion, twenty-one million, five hundred sixty-three thousand, one hundred twenty".