128439851371 has 8 divisors (see below), whose sum is σ = 138622515584. Its totient is φ = 118300426560.

The previous prime is 128439851329. The next prime is 128439851381. The reversal of 128439851371 is 173158934821.

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 128439851371 - 2¹³ = 128439843179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128439851381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10803675 + ... + 10815556.

It is an arithmetic number, because the mean of its divisors is an integer number (17327814448).

Almost surely, 2^128439851371 is an apocalyptic number.

128439851371 is a deficient number, since it is larger than the sum of its proper divisors (10182664213).

128439851371 is a wasteful number, since it uses less digits than its factorization.

128439851371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21619701.

The product of its digits is 1451520, while the sum is 52.

The spelling of 128439851371 in words is "one hundred twenty-eight billion, four hundred thirty-nine million, eight hundred fifty-one thousand, three hundred seventy-one".