128506047870 has 64 divisors (see below), whose sum is σ = 319120845120. Its totient is φ = 33079216128.

The previous prime is 128506047851. The next prime is 128506047877. The reversal of 128506047870 is 78740605821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128506047877) 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, 4625862 + ... + 4653558.

It is an arithmetic number, because the mean of its divisors is an integer number (4986263205).

Almost surely, 2^128506047870 is an apocalyptic number.

128506047870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128506047870 is an abundant number, since it is smaller than the sum of its proper divisors (190614797250).

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

128506047870 is a wasteful number, since it uses less digits than its factorization.

128506047870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33069.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 128506047870 in words is "one hundred twenty-eight billion, five hundred six million, forty-seven thousand, eight hundred seventy".