55578981427200 has 2304 divisors, whose sum is σ = 267932351232000. Its totient is φ = 10940645376000.

The previous prime is 55578981427157. The next prime is 55578981427259. The reversal of 55578981427200 is 272418987555.

55578981427200 is a `hidden beast` number, since 5 + 5 + 57 + 89 + 81 + 427 + 2 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2304).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2022437460 + ... + 2022464940.

It is an arithmetic number, because the mean of its divisors is an integer number (116290083000).

Almost surely, 2^{55578981427200} is an apocalyptic number.

55578981427200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55578981427200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133966175616000).

55578981427200 is an abundant number, since it is smaller than the sum of its proper divisors (212353369804800).

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

55578981427200 is a wasteful number, since it uses less digits than its factorization.

55578981427200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27559 (or 27528 counting only the distinct ones).

The product of its (nonzero) digits is 56448000, while the sum is 63.

The spelling of 55578981427200 in words is "fifty-five trillion, five hundred seventy-eight billion, nine hundred eighty-one million, four hundred twenty-seven thousand, two hundred".