509688959519 has 2 divisors, whose sum is σ = 509688959520. Its totient is φ = 509688959518.

The previous prime is 509688959491. The next prime is 509688959621. The reversal of 509688959519 is 915959886905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509688959519 - 2³² = 505393992223 is a prime.

It is a super-2 number, since 2×509688959519² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509688952519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254844479759 + 254844479760.

It is an arithmetic number, because the mean of its divisors is an integer number (254844479760).

Almost surely, 2^509688959519 is an apocalyptic number.

509688959519 is a deficient number, since it is larger than the sum of its proper divisors (1).

509688959519 is an equidigital number, since it uses as much as digits as its factorization.

509688959519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928000, while the sum is 74.

The spelling of 509688959519 in words is "five hundred nine billion, six hundred eighty-eight million, nine hundred fifty-nine thousand, five hundred nineteen".