128566712140 has 24 divisors (see below), whose sum is σ = 284200101360. Its totient is φ = 48720017088.

The previous prime is 128566712119. The next prime is 128566712143. The reversal of 128566712140 is 41217665821.

It is not an unprimeable number, because it can be changed into a prime (128566712143) 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, 169166347 + ... + 169167106.

It is an arithmetic number, because the mean of its divisors is an integer number (11841670890).

Almost surely, 2^128566712140 is an apocalyptic number.

128566712140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128566712140 is an abundant number, since it is smaller than the sum of its proper divisors (155633389220).

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

128566712140 is a wasteful number, since it uses less digits than its factorization.

128566712140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338333481 (or 338333479 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 128566712140 in words is "one hundred twenty-eight billion, five hundred sixty-six million, seven hundred twelve thousand, one hundred forty".