509391908046888 has 128 divisors (see below), whose sum is σ = 1290140694213120. Its totient is φ = 167586829977600.

The previous prime is 509391908046881. The next prime is 509391908046929. The reversal of 509391908046888 is 888640809193905.

It is not an unprimeable number, because it can be changed into a prime (509391908046881) 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, 2114477770 + ... + 2114718662.

It is an arithmetic number, because the mean of its divisors is an integer number (10079224173540).

Almost surely, 2^{509391908046888} is an apocalyptic number.

It is an amenable number.

509391908046888 is an abundant number, since it is smaller than the sum of its proper divisors (780748786166232).

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

509391908046888 is a wasteful number, since it uses less digits than its factorization.

509391908046888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243747 (or 243743 counting only the distinct ones).

The product of its (nonzero) digits is 1074954240, while the sum is 78.

The spelling of 509391908046888 in words is "five hundred nine trillion, three hundred ninety-one billion, nine hundred eight million, forty-six thousand, eight hundred eighty-eight".