128346123889 has 8 divisors (see below), whose sum is σ = 129036862080. Its totient is φ = 127656810000.

The previous prime is 128346123827. The next prime is 128346123901. The reversal of 128346123889 is 988321643821.

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 128346123889 - 2⁷ = 128346123761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128346123289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175122 + ... + 536059.

It is an arithmetic number, because the mean of its divisors is an integer number (16129607760).

Almost surely, 2^128346123889 is an apocalyptic number.

It is an amenable number.

128346123889 is a deficient number, since it is larger than the sum of its proper divisors (690738191).

128346123889 is an equidigital number, since it uses as much as digits as its factorization.

128346123889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712151.

The product of its digits is 3981312, while the sum is 55.

The spelling of 128346123889 in words is "one hundred twenty-eight billion, three hundred forty-six million, one hundred twenty-three thousand, eight hundred eighty-nine".