128165368320 has 720 divisors, whose sum is σ = 503971243776. Its totient is φ = 30047846400.

The previous prime is 128165368307. The next prime is 128165368363. The reversal of 128165368320 is 23863561821.

128165368320 is a `hidden beast` number, since 1 + 2 + 8 + 16 + 536 + 83 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 86422299 + ... + 86423781.

Almost surely, 2^128165368320 is an apocalyptic number.

128165368320 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 128165368320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251985621888).

128165368320 is an abundant number, since it is smaller than the sum of its proper divisors (375805875456).

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

128165368320 is a wasteful number, since it uses less digits than its factorization.

128165368320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 128165368320 in words is "one hundred twenty-eight billion, one hundred sixty-five million, three hundred sixty-eight thousand, three hundred twenty".