128481253240 has 32 divisors (see below), whose sum is σ = 293982534000. Its totient is φ = 50521441024.

The previous prime is 128481253207. The next prime is 128481253249. The reversal of 128481253240 is 42352184821.

It is a happy number.

128481253240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 128481253193 and 128481253202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128481253249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27218245 + ... + 27222964.

Almost surely, 2^128481253240 is an apocalyptic number.

128481253240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128481253240 is an abundant number, since it is smaller than the sum of its proper divisors (165501280760).

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

128481253240 is a wasteful number, since it uses less digits than its factorization.

128481253240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54441279 (or 54441275 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 128481253240 in words is "one hundred twenty-eight billion, four hundred eighty-one million, two hundred fifty-three thousand, two hundred forty".