128913120000 has 1800 divisors, whose sum is σ = 579480132000. Its totient is φ = 28449792000.

The previous prime is 128913119987. The next prime is 128913120013. The reversal of 128913120000 is 21319821.

It is an interprime number because it is at equal distance from previous prime (128913119987) and next prime (128913120013).

It is a tau number, because it is divible by the number of its divisors (1800).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 4445279986 + ... + 4445280014.

Almost surely, 2^128913120000 is an apocalyptic number.

128913120000 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 128913120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289740066000).

128913120000 is an abundant number, since it is smaller than the sum of its proper divisors (450567012000).

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

128913120000 is an frugal number, since it uses more digits than its factorization.

128913120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

Adding to 128913120000 its reverse (21319821), we get a palindrome (128934439821).

The spelling of 128913120000 in words is "one hundred twenty-eight billion, nine hundred thirteen million, one hundred twenty thousand".