128479917693 has 8 divisors (see below), whose sum is σ = 173002661856. Its totient is φ = 84805226000.

The previous prime is 128479917667. The next prime is 128479917719. The reversal of 128479917693 is 396719974821.

It is an interprime number because it is at equal distance from previous prime (128479917667) and next prime (128479917719).

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 128479917693 - 2¹⁴ = 128479901309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128479987693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212012763 + ... + 212013368.

It is an arithmetic number, because the mean of its divisors is an integer number (21625332732).

Almost surely, 2^128479917693 is an apocalyptic number.

It is an amenable number.

128479917693 is a deficient number, since it is larger than the sum of its proper divisors (44522744163).

128479917693 is a wasteful number, since it uses less digits than its factorization.

128479917693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424026235.

The product of its digits is 41150592, while the sum is 66.

The spelling of 128479917693 in words is "one hundred twenty-eight billion, four hundred seventy-nine million, nine hundred seventeen thousand, six hundred ninety-three".