509922747938 has 6 divisors (see below), whose sum is σ = 764885636721. Its totient is φ = 254960869032.

The previous prime is 509922747907. The next prime is 509922747941. The reversal of 509922747938 is 839747229905.

It can be written as a sum of positive squares in 2 ways, for example, as 497170240609 + 12752507329 = 705103^2 + 112927^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=504937.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 757406 + ... + 1262342.

Almost surely, 2^509922747938 is an apocalyptic number.

509922747938 is a deficient number, since it is larger than the sum of its proper divisors (254962888783).

509922747938 is an frugal number, since it uses more digits than its factorization.

509922747938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009876 (or 504939 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 65.

The spelling of 509922747938 in words is "five hundred nine billion, nine hundred twenty-two million, seven hundred forty-seven thousand, nine hundred thirty-eight".