128197230479 has 8 divisors (see below), whose sum is σ = 131912898432. Its totient is φ = 124509605760.

The previous prime is 128197230449. The next prime is 128197230589. The reversal of 128197230479 is 974032791821.

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

It is a cyclic number.

It is not a de Polignac number, because 128197230479 - 2²⁸ = 127928795023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128197230479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128197230449) 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, 7001534 + ... + 7019819.

It is an arithmetic number, because the mean of its divisors is an integer number (16489112304).

Almost surely, 2^128197230479 is an apocalyptic number.

128197230479 is a deficient number, since it is larger than the sum of its proper divisors (3715667953).

128197230479 is a wasteful number, since it uses less digits than its factorization.

128197230479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14021617.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 128197230479 in words is "one hundred twenty-eight billion, one hundred ninety-seven million, two hundred thirty thousand, four hundred seventy-nine".