128240261600 has 144 divisors (see below), whose sum is σ = 361617386256. Its totient is φ = 43889664000.

The previous prime is 128240261587. The next prime is 128240261609. The reversal of 128240261600 is 6162042821.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128240261609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279011 + ... + 578210.

It is an arithmetic number, because the mean of its divisors is an integer number (2511231849).

Almost surely, 2^128240261600 is an apocalyptic number.

128240261600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128240261600 is an abundant number, since it is smaller than the sum of its proper divisors (233377124656).

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

128240261600 is a wasteful number, since it uses less digits than its factorization.

128240261600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857269 (or 857256 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 128240261600 in words is "one hundred twenty-eight billion, two hundred forty million, two hundred sixty-one thousand, six hundred".