128948713717 has 8 divisors (see below), whose sum is σ = 129144163232. Its totient is φ = 128753355600.

The previous prime is 128948713697. The next prime is 128948713811. The reversal of 128948713717 is 717317849821.

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-128948713717 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 (128948710717) 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, 3123742 + ... + 3164752.

It is an arithmetic number, because the mean of its divisors is an integer number (16143020404).

Almost surely, 2^128948713717 is an apocalyptic number.

It is an amenable number.

128948713717 is a deficient number, since it is larger than the sum of its proper divisors (195449515).

128948713717 is an equidigital number, since it uses as much as digits as its factorization.

128948713717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45699.

The product of its digits is 4741632, while the sum is 58.

The spelling of 128948713717 in words is "one hundred twenty-eight billion, nine hundred forty-eight million, seven hundred thirteen thousand, seven hundred seventeen".