128959845870 has 32 divisors (see below), whose sum is σ = 309541214880. Its totient is φ = 34385116160.

The previous prime is 128959845827. The next prime is 128959845877. The reversal of 128959845870 is 78548959821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128959845877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5751 + ... + 507890.

It is an arithmetic number, because the mean of its divisors is an integer number (9673162965).

Almost surely, 2^128959845870 is an apocalyptic number.

128959845870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128959845870 is an abundant number, since it is smaller than the sum of its proper divisors (180581369010).

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

128959845870 is a wasteful number, since it uses less digits than its factorization.

128959845870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522020.

The product of its (nonzero) digits is 58060800, while the sum is 66.

The spelling of 128959845870 in words is "one hundred twenty-eight billion, nine hundred fifty-nine million, eight hundred forty-five thousand, eight hundred seventy".