509718139294 has 24 divisors (see below), whose sum is σ = 957822000408. Its totient is φ = 201646735920.

The previous prime is 509718139279. The next prime is 509718139349. The reversal of 509718139294 is 492931817905.

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, 200045092 + ... + 200047639.

It is an arithmetic number, because the mean of its divisors is an integer number (39909250017).

Almost surely, 2^509718139294 is an apocalyptic number.

509718139294 is a deficient number, since it is larger than the sum of its proper divisors (448103861114).

509718139294 is a wasteful number, since it uses less digits than its factorization.

509718139294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400092760 (or 400092753 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 509718139294 in words is "five hundred nine billion, seven hundred eighteen million, one hundred thirty-nine thousand, two hundred ninety-four".