128501358438 has 8 divisors (see below), whose sum is σ = 257002716888. Its totient is φ = 42833786144.

The previous prime is 128501358437. The next prime is 128501358439. The reversal of 128501358438 is 834853105821.

128501358438 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (128501358437) and next prime (128501358439).

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

128501358438 is an admirable number.

It is a super-2 number, since 2×128501358438² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128501358437) 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 3 ways as a sum of consecutive naturals, for example, 10708446531 + ... + 10708446542.

It is an arithmetic number, because the mean of its divisors is an integer number (32125339611).

Almost surely, 2^128501358438 is an apocalyptic number.

128501358438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128501358438 is a wasteful number, since it uses less digits than its factorization.

128501358438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21416893078.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 128501358438 in words is "one hundred twenty-eight billion, five hundred one million, three hundred fifty-eight thousand, four hundred thirty-eight".