128163081600 has 384 divisors, whose sum is σ = 496637632800. Its totient is φ = 32166051840.

The previous prime is 128163081587. The next prime is 128163081623. The reversal of 128163081600 is 6180361821.

128163081600 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 630 + 8 + 16 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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 47 ways as a sum of consecutive naturals, for example, 1425172 + ... + 1512428.

Almost surely, 2^128163081600 is an apocalyptic number.

128163081600 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 128163081600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248318816400).

128163081600 is an abundant number, since it is smaller than the sum of its proper divisors (368474551200).

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

128163081600 is a wasteful number, since it uses less digits than its factorization.

128163081600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87307 (or 87284 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 128163081600 in words is "one hundred twenty-eight billion, one hundred sixty-three million, eighty-one thousand, six hundred".