128155668480 has 832 divisors, whose sum is σ = 527096747520. Its totient is φ = 28934406144.

The previous prime is 128155668371. The next prime is 128155668521. The reversal of 128155668480 is 84866551821.

128155668480 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 556 + 6 + 8 + 4 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 437391214 + ... + 437391506.

Almost surely, 2^128155668480 is an apocalyptic number.

128155668480 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 128155668480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263548373760).

128155668480 is an abundant number, since it is smaller than the sum of its proper divisors (398941079040).

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

128155668480 is a wasteful number, since it uses less digits than its factorization.

128155668480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 54.

The spelling of 128155668480 in words is "one hundred twenty-eight billion, one hundred fifty-five million, six hundred sixty-eight thousand, four hundred eighty".