55448345880 has 640 divisors, whose sum is σ = 199168865280. Its totient is φ = 13818193920.

The previous prime is 55448345879. The next prime is 55448345899. The reversal of 55448345880 is 8854384455.

55448345880 is a `hidden beast` number, since 5 + 54 + 4 + 8 + 3 + 4 + 588 + 0 = 666.

It is a super-2 number, since 2×55448345880² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 159 ways as a sum of consecutive naturals, for example, 518208787 + ... + 518208893.

It is an arithmetic number, because the mean of its divisors is an integer number (311201352).

Almost surely, 2^55448345880 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 55448345880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99584432640).

55448345880 is an abundant number, since it is smaller than the sum of its proper divisors (143720519400).

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

55448345880 is a wasteful number, since it uses less digits than its factorization.

55448345880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 12288000, while the sum is 54.

The spelling of 55448345880 in words is "fifty-five billion, four hundred forty-eight million, three hundred forty-five thousand, eight hundred eighty".