128403155232 has 384 divisors, whose sum is σ = 424116000000. Its totient is φ = 37437603840.

The previous prime is 128403155213. The next prime is 128403155267. The reversal of 128403155232 is 232551304821.

128403155232 is a `hidden beast` number, since 1 + 2 + 8 + 40 + 31 + 552 + 32 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102804144 + ... + 102805392.

It is an arithmetic number, because the mean of its divisors is an integer number (1104468750).

Almost surely, 2^128403155232 is an apocalyptic number.

128403155232 is a gapful number since it is divisible by the number (12) 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 128403155232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212058000000).

128403155232 is an abundant number, since it is smaller than the sum of its proper divisors (295712844768).

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

128403155232 is a wasteful number, since it uses less digits than its factorization.

128403155232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 128403155232 in words is "one hundred twenty-eight billion, four hundred three million, one hundred fifty-five thousand, two hundred thirty-two".