55016478720 has 1152 divisors, whose sum is σ = 236626790400. Its totient is φ = 12076646400.

The previous prime is 55016478677. The next prime is 55016478739. The reversal of 55016478720 is 2787461055.

55016478720 is a `hidden beast` number, since 5 + 501 + 6 + 4 + 78 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 419973055 + ... + 419973185.

It is an arithmetic number, because the mean of its divisors is an integer number (205405200).

Almost surely, 2^55016478720 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 55016478720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118313395200).

55016478720 is an abundant number, since it is smaller than the sum of its proper divisors (181610311680).

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

55016478720 is a wasteful number, since it uses less digits than its factorization.

55016478720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 55016478720 in words is "fifty-five billion, sixteen million, four hundred seventy-eight thousand, seven hundred twenty".