55238544720 has 240 divisors, whose sum is σ = 196664412672. Its totient is φ = 13846671360.

The previous prime is 55238544719. The next prime is 55238544763. The reversal of 55238544720 is 2744583255.

55238544720 is a `hidden beast` number, since 5 + 5 + 2 + 38 + 544 + 72 + 0 = 666.

55238544720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

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 47 ways as a sum of consecutive naturals, for example, 12029625 + ... + 12034215.

Almost surely, 2^55238544720 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 55238544720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98332206336).

55238544720 is an abundant number, since it is smaller than the sum of its proper divisors (141425867952).

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

55238544720 is a wasteful number, since it uses less digits than its factorization.

55238544720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610 (or 5601 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 55238544720 in words is "fifty-five billion, two hundred thirty-eight million, five hundred forty-four thousand, seven hundred twenty".