55518912000 has 960 divisors, whose sum is σ = 218890900800. Its totient is φ = 13868236800.

The previous prime is 55518911999. The next prime is 55518912023. The reversal of 55518912000 is 21981555.

It is a happy number.

55518912000 is a `hidden beast` number, since 5 + 551 + 89 + 1 + 20 + 0 + 0 = 666.

55518912000 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 (960).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 623807956 + ... + 623808044.

It is an arithmetic number, because the mean of its divisors is an integer number (228011355).

Almost surely, 2^55518912000 is an apocalyptic number.

55518912000 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 55518912000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109445450400).

55518912000 is an abundant number, since it is smaller than the sum of its proper divisors (163371988800).

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

55518912000 is an equidigital number, since it uses as much as digits as its factorization.

55518912000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 55518912000 in words is "fifty-five billion, five hundred eighteen million, nine hundred twelve thousand".