128719042871 has 8 divisors (see below), whose sum is σ = 129352211280. Its totient is φ = 128087303488.

The previous prime is 128719042861. The next prime is 128719042901. The reversal of 128719042871 is 178240917821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128719042871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128719042801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176441 + ... + 537186.

It is an arithmetic number, because the mean of its divisors is an integer number (16169026410).

Almost surely, 2^128719042871 is an apocalyptic number.

128719042871 is a deficient number, since it is larger than the sum of its proper divisors (633168409).

128719042871 is an equidigital number, since it uses as much as digits as its factorization.

128719042871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714513.

The product of its (nonzero) digits is 451584, while the sum is 50.

The spelling of 128719042871 in words is "one hundred twenty-eight billion, seven hundred nineteen million, forty-two thousand, eight hundred seventy-one".