128277383520 has 192 divisors, whose sum is σ = 474716277504. Its totient is φ = 28705413120.

The previous prime is 128277383483. The next prime is 128277383527. The reversal of 128277383520 is 25383772821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128277383520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128277383527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865782 + ... + 1003061.

It is an arithmetic number, because the mean of its divisors is an integer number (2472480612).

Almost surely, 2^128277383520 is an apocalyptic number.

128277383520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128277383520 is an abundant number, since it is smaller than the sum of its proper divisors (346438893984).

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

128277383520 is a wasteful number, since it uses less digits than its factorization.

128277383520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868885 (or 1868877 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 128277383520 in words is "one hundred twenty-eight billion, two hundred seventy-seven million, three hundred eighty-three thousand, five hundred twenty".