55504120320 has 640 divisors, whose sum is σ = 221003354880. Its totient is φ = 13085245440.

The previous prime is 55504120319. The next prime is 55504120337. The reversal of 55504120320 is 2302140555.

It is a happy number.

55504120320 is a `hidden beast` number, since 5 + 5 + 504 + 120 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28130854 + ... + 28132826.

It is an arithmetic number, because the mean of its divisors is an integer number (345317742).

Almost surely, 2^55504120320 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 55504120320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110501677440).

55504120320 is an abundant number, since it is smaller than the sum of its proper divisors (165499234560).

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

55504120320 is a wasteful number, since it uses less digits than its factorization.

55504120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 55504120320 its reverse (2302140555), we get a palindrome (57806260875).

The spelling of 55504120320 in words is "fifty-five billion, five hundred four million, one hundred twenty thousand, three hundred twenty".