509683491898 has 64 divisors (see below), whose sum is σ = 923479603200. Its totient is φ = 206096581440.

The previous prime is 509683491893. The next prime is 509683491923. The reversal of 509683491898 is 898194386905.

It is not an unprimeable number, because it can be changed into a prime (509683491893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166507288 + ... + 166510348.

It is an arithmetic number, because the mean of its divisors is an integer number (14429368800).

Almost surely, 2^509683491898 is an apocalyptic number.

509683491898 is a deficient number, since it is larger than the sum of its proper divisors (413796111302).

509683491898 is a wasteful number, since it uses less digits than its factorization.

509683491898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5435.

The product of its (nonzero) digits is 134369280, while the sum is 70.

The spelling of 509683491898 in words is "five hundred nine billion, six hundred eighty-three million, four hundred ninety-one thousand, eight hundred ninety-eight".