128876670720 has 432 divisors, whose sum is σ = 515354374080. Its totient is φ = 29124919296.

The previous prime is 128876670719. The next prime is 128876670721. The reversal of 128876670720 is 27076678821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128876670719) and next prime (128876670721).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128876670721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7167982 + ... + 7185938.

It is an arithmetic number, because the mean of its divisors is an integer number (1192949940).

Almost surely, 2^128876670720 is an apocalyptic number.

128876670720 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 128876670720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257677187040).

128876670720 is an abundant number, since it is smaller than the sum of its proper divisors (386477703360).

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

128876670720 is a wasteful number, since it uses less digits than its factorization.

128876670720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18080 (or 18063 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 128876670720 in words is "one hundred twenty-eight billion, eight hundred seventy-six million, six hundred seventy thousand, seven hundred twenty".