128155081376 has 144 divisors (see below), whose sum is σ = 302987522376. Its totient is φ = 53163177984.

The previous prime is 128155081367. The next prime is 128155081421. The reversal of 128155081376 is 673180551821.

It can be written as a sum of positive squares in 4 ways, for example, as 125795064976 + 2360016400 = 354676^2 + 48580^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128155081376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11423546 + ... + 11434758.

Almost surely, 2^128155081376 is an apocalyptic number.

128155081376 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 128155081376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151493761188).

128155081376 is an abundant number, since it is smaller than the sum of its proper divisors (174832441000).

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

128155081376 is a wasteful number, since it uses less digits than its factorization.

128155081376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471 (or 11456 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 128155081376 in words is "one hundred twenty-eight billion, one hundred fifty-five million, eighty-one thousand, three hundred seventy-six".