55530578000 has 160 divisors (see below), whose sum is σ = 142173757440. Its totient is φ = 20919052800.

The previous prime is 55530577961. The next prime is 55530578009. The reversal of 55530578000 is 87503555.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530578009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6569777 + ... + 6578223.

It is an arithmetic number, because the mean of its divisors is an integer number (888585984).

Almost surely, 2^55530578000 is an apocalyptic number.

55530578000 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 55530578000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71086878720).

55530578000 is an abundant number, since it is smaller than the sum of its proper divisors (86643179440).

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

55530578000 is a wasteful number, since it uses less digits than its factorization.

55530578000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662 (or 8646 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 38.

The spelling of 55530578000 in words is "fifty-five billion, five hundred thirty million, five hundred seventy-eight thousand".