128351938458 has 64 divisors (see below), whose sum is σ = 274387898880. Its totient is φ = 39906820800.

The previous prime is 128351938453. The next prime is 128351938471. The reversal of 128351938458 is 854839153821.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128351938398 and 128351938407.

It is not an unprimeable number, because it can be changed into a prime (128351938453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22995228 + ... + 23000808.

It is an arithmetic number, because the mean of its divisors is an integer number (4287310920).

Almost surely, 2^128351938458 is an apocalyptic number.

128351938458 is an abundant number, since it is smaller than the sum of its proper divisors (146035960422).

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

128351938458 is a wasteful number, since it uses less digits than its factorization.

128351938458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683.

The product of its digits is 8294400, while the sum is 57.

The spelling of 128351938458 in words is "one hundred twenty-eight billion, three hundred fifty-one million, nine hundred thirty-eight thousand, four hundred fifty-eight".