509686829694 has 24 divisors (see below), whose sum is σ = 1262081673840. Its totient is φ = 145624808448.

The previous prime is 509686829681. The next prime is 509686829711. The reversal of 509686829694 is 496928686905.

509686829694 is a `hidden beast` number, since 509 + 6 + 8 + 6 + 8 + 29 + 6 + 94 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2022566659 + ... + 2022566910.

It is an arithmetic number, because the mean of its divisors is an integer number (52586736410).

Almost surely, 2^509686829694 is an apocalyptic number.

509686829694 is an abundant number, since it is smaller than the sum of its proper divisors (752394844146).

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

509686829694 is a wasteful number, since it uses less digits than its factorization.

509686829694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045133584 (or 4045133581 counting only the distinct ones).

The product of its (nonzero) digits is 403107840, while the sum is 72.

The spelling of 509686829694 in words is "five hundred nine billion, six hundred eighty-six million, eight hundred twenty-nine thousand, six hundred ninety-four".