128132640768 has 208 divisors, whose sum is σ = 373600814976. Its totient is φ = 38734725120.

The previous prime is 128132640739. The next prime is 128132640799. The reversal of 128132640768 is 867046231821.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73936030 + ... + 73937762.

Almost surely, 2^128132640768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128132640768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186800407488).

128132640768 is an abundant number, since it is smaller than the sum of its proper divisors (245468174208).

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

128132640768 is a wasteful number, since it uses less digits than its factorization.

128132640768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2296 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 128132640768 in words is "one hundred twenty-eight billion, one hundred thirty-two million, six hundred forty thousand, seven hundred sixty-eight".