128031517317858 has 64 divisors (see below), whose sum is σ = 319248668971008. Its totient is φ = 33254809441920.

The previous prime is 128031517317827. The next prime is 128031517317871. The reversal of 128031517317858 is 858713715130821.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190219191 + ... + 190891077.

It is an arithmetic number, because the mean of its divisors is an integer number (4988260452672).

Almost surely, 2^{128031517317858} is an apocalyptic number.

128031517317858 is an abundant number, since it is smaller than the sum of its proper divisors (191217151653150).

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

128031517317858 is a wasteful number, since it uses less digits than its factorization.

128031517317858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084367.

The product of its (nonzero) digits is 11289600, while the sum is 60.

The spelling of 128031517317858 in words is "one hundred twenty-eight trillion, thirty-one billion, five hundred seventeen million, three hundred seventeen thousand, eight hundred fifty-eight".