128408478750719 has 8 divisors (see below), whose sum is σ = 133132206690000. Its totient is φ = 123704474102272.

The previous prime is 128408478750593. The next prime is 128408478750751. The reversal of 128408478750719 is 917057874804821.

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

It is not a de Polignac number, because 128408478750719 - 2³² = 128404183783423 is a prime.

It is a super-2 number, since 2×128408478750719² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128408478753719) 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, 4930809449 + ... + 4930835490.

It is an arithmetic number, because the mean of its divisors is an integer number (16641525836250).

Almost surely, 2^{128408478750719} is an apocalyptic number.

128408478750719 is a deficient number, since it is larger than the sum of its proper divisors (4723727939281).

128408478750719 is an equidigital number, since it uses as much as digits as its factorization.

128408478750719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9861645417.

The product of its (nonzero) digits is 252887040, while the sum is 71.

The spelling of 128408478750719 in words is "one hundred twenty-eight trillion, four hundred eight billion, four hundred seventy-eight million, seven hundred fifty thousand, seven hundred nineteen".