128587447296 has 1584 divisors, whose sum is σ = 534918764800. Its totient is φ = 29780213760.

The previous prime is 128587447291. The next prime is 128587447321. The reversal of 128587447296 is 692744785821.

It is a happy number.

128587447296 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 8 + 74 + 472 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (1584).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128587447291) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6767760375 + ... + 6767760393.

Almost surely, 2^128587447296 is an apocalyptic number.

128587447296 is a gapful number since it is divisible by the number (16) 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 128587447296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267459382400).

128587447296 is an abundant number, since it is smaller than the sum of its proper divisors (406331317504).

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

128587447296 is a wasteful number, since it uses less digits than its factorization.

128587447296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 59 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 128587447296 in words is "one hundred twenty-eight billion, five hundred eighty-seven million, four hundred forty-seven thousand, two hundred ninety-six".