128609201798 has 128 divisors (see below), whose sum is σ = 260091648000. Its totient is φ = 46193495040.

The previous prime is 128609201797. The next prime is 128609201807. The reversal of 128609201798 is 897102906821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128609201797) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113913698 + ... + 113914826.

It is an arithmetic number, because the mean of its divisors is an integer number (2031966000).

Almost surely, 2^128609201798 is an apocalyptic number.

128609201798 is an abundant number, since it is smaller than the sum of its proper divisors (131482446202).

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

128609201798 is a wasteful number, since it uses less digits than its factorization.

128609201798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 128609201798 in words is "one hundred twenty-eight billion, six hundred nine million, two hundred one thousand, seven hundred ninety-eight".