128403206079 has 8 divisors (see below), whose sum is σ = 171222093360. Its totient is φ = 85593228096.

The previous prime is 128403206017. The next prime is 128403206083. The reversal of 128403206079 is 970602304821.

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

It is not a de Polignac number, because 128403206079 - 2¹³ = 128403197887 is a prime.

It is a super-2 number, since 2×128403206079² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128403206079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128403202079) 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, 2193622 + ... + 2251395.

It is an arithmetic number, because the mean of its divisors is an integer number (21402761670).

Almost surely, 2^128403206079 is an apocalyptic number.

128403206079 is a deficient number, since it is larger than the sum of its proper divisors (42818887281).

128403206079 is an equidigital number, since it uses as much as digits as its factorization.

128403206079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454649.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 128403206079 in words is "one hundred twenty-eight billion, four hundred three million, two hundred six thousand, seventy-nine".