1123543872000 has 3200 divisors, whose sum is σ = 5172030040320. Its totient is φ = 238878720000.

The previous prime is 1123543871977. The next prime is 1123543872007. The reversal of 1123543872000 is 2783453211.

1123543872000 is a `hidden beast` number, since 1 + 1 + 23 + 54 + 387 + 200 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3200).

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

It is not an unprimeable number, because it can be changed into a prime (1123543872007) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 18418751970 + ... + 18418752030.

Almost surely, 2^{1123543872000} is an apocalyptic number.

1123543872000 is a gapful number since it is divisible by the number (10) 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 1123543872000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2586015020160).

1123543872000 is an abundant number, since it is smaller than the sum of its proper divisors (4048486168320).

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

1123543872000 is a wasteful number, since it uses less digits than its factorization.

1123543872000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 1123543872000 in words is "one trillion, one hundred twenty-three billion, five hundred forty-three million, eight hundred seventy-two thousand".