509683491892 has 12 divisors (see below), whose sum is σ = 944413529220. Its totient is φ = 239851054976.

The previous prime is 509683491887. The next prime is 509683491893. The reversal of 509683491892 is 298194386905.

It can be written as a sum of positive squares in 2 ways, for example, as 243299508516 + 266383983376 = 493254^2 + 516124^2 .

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3747672667 + ... + 3747672802.

It is an arithmetic number, because the mean of its divisors is an integer number (78701127435).

Almost surely, 2^509683491892 is an apocalyptic number.

It is an amenable number.

509683491892 is a deficient number, since it is larger than the sum of its proper divisors (434730037328).

509683491892 is a wasteful number, since it uses less digits than its factorization.

509683491892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7495345490 (or 7495345488 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 509683491892 in words is "five hundred nine billion, six hundred eighty-three million, four hundred ninety-one thousand, eight hundred ninety-two".