128197230478 has 8 divisors (see below), whose sum is σ = 192469244760. Its totient is φ = 64040815560.

The previous prime is 128197230449. The next prime is 128197230589. The reversal of 128197230478 is 874032791821.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28897068 + ... + 28901503.

It is an arithmetic number, because the mean of its divisors is an integer number (24058655595).

Almost surely, 2^128197230478 is an apocalyptic number.

128197230478 is a deficient number, since it is larger than the sum of its proper divisors (64272014282).

128197230478 is a wasteful number, since it uses less digits than its factorization.

128197230478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57799682.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 128197230478 in words is "one hundred twenty-eight billion, one hundred ninety-seven million, two hundred thirty thousand, four hundred seventy-eight".