509318985694 has 16 divisors (see below), whose sum is σ = 767562279120. Its totient is φ = 253467688320.

The previous prime is 509318985691. The next prime is 509318985697. The reversal of 509318985694 is 496589813905.

It is an interprime number because it is at equal distance from previous prime (509318985691) and next prime (509318985697).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509318985691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333904 + ... + 1063075.

It is an arithmetic number, because the mean of its divisors is an integer number (47972642445).

Almost surely, 2^509318985694 is an apocalyptic number.

509318985694 is a deficient number, since it is larger than the sum of its proper divisors (258243293426).

509318985694 is a wasteful number, since it uses less digits than its factorization.

509318985694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397835.

The product of its (nonzero) digits is 83980800, while the sum is 67.

The spelling of 509318985694 in words is "five hundred nine billion, three hundred eighteen million, nine hundred eighty-five thousand, six hundred ninety-four".