128044560820 has 48 divisors (see below), whose sum is σ = 294294103488. Its totient is φ = 46409967360.

The previous prime is 128044560811. The next prime is 128044560857. The reversal of 128044560820 is 28065440821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880377 + ... + 1015456.

It is an arithmetic number, because the mean of its divisors is an integer number (6131127156).

Almost surely, 2^128044560820 is an apocalyptic number.

128044560820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128044560820 is an abundant number, since it is smaller than the sum of its proper divisors (166249542668).

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

128044560820 is a wasteful number, since it uses less digits than its factorization.

128044560820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896160 (or 1896158 counting only the distinct ones).

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

The spelling of 128044560820 in words is "one hundred twenty-eight billion, forty-four million, five hundred sixty thousand, eight hundred twenty".