128964804387 has 16 divisors (see below), whose sum is σ = 173551493280. Its totient is φ = 85177516032.

The previous prime is 128964804383. The next prime is 128964804389. The reversal of 128964804387 is 783408469821.

It is a happy number.

It is not a de Polignac number, because 128964804387 - 2² = 128964804383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128964804387.

It is not an unprimeable number, because it can be changed into a prime (128964804383) 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, 3497893 + ... + 3534569.

It is an arithmetic number, because the mean of its divisors is an integer number (10846968330).

Almost surely, 2^128964804387 is an apocalyptic number.

128964804387 is a deficient number, since it is larger than the sum of its proper divisors (44586688893).

128964804387 is a wasteful number, since it uses less digits than its factorization.

128964804387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47542.

The product of its (nonzero) digits is 18579456, while the sum is 60.

The spelling of 128964804387 in words is "one hundred twenty-eight billion, nine hundred sixty-four million, eight hundred four thousand, three hundred eighty-seven".