55471201920 has 256 divisors, whose sum is σ = 196701696000. Its totient is φ = 14774169600.

The previous prime is 55471201883. The next prime is 55471201969. The reversal of 55471201920 is 2910217455.

55471201920 is a `hidden beast` number, since 5 + 547 + 1 + 20 + 1 + 92 + 0 = 666.

55471201920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19887886 + ... + 19890674.

It is an arithmetic number, because the mean of its divisors is an integer number (768366000).

Almost surely, 2^55471201920 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 55471201920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98350848000).

55471201920 is an abundant number, since it is smaller than the sum of its proper divisors (141230494080).

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

55471201920 is a wasteful number, since it uses less digits than its factorization.

55471201920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968 (or 3950 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 55471201920 in words is "fifty-five billion, four hundred seventy-one million, two hundred one thousand, nine hundred twenty".