55571815200 has 432 divisors, whose sum is σ = 205272361728. Its totient is φ = 13035264000.

The previous prime is 55571815193. The next prime is 55571815223. The reversal of 55571815200 is 251817555.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8999314 + ... + 9005486.

It is an arithmetic number, because the mean of its divisors is an integer number (475167504).

Almost surely, 2^55571815200 is an apocalyptic number.

55571815200 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 55571815200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102636180864).

55571815200 is an abundant number, since it is smaller than the sum of its proper divisors (149700546528).

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

55571815200 is a wasteful number, since it uses less digits than its factorization.

55571815200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249 (or 6225 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 39.

The spelling of 55571815200 in words is "fifty-five billion, five hundred seventy-one million, eight hundred fifteen thousand, two hundred".