509516333338 has 4 divisors (see below), whose sum is σ = 764274500010. Its totient is φ = 254758166668.

The previous prime is 509516333321. The next prime is 509516333341. The reversal of 509516333338 is 833333615905.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 382884975729 + 126631357609 = 618777^2 + 355853^2 .

It is a junction number, because it is equal to n+sod(n) for n = 509516333291 and 509516333300.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127379083333 + ... + 127379083336.

Almost surely, 2^509516333338 is an apocalyptic number.

509516333338 is a deficient number, since it is larger than the sum of its proper divisors (254758166672).

509516333338 is a wasteful number, since it uses less digits than its factorization.

509516333338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254758166671.

The product of its (nonzero) digits is 2624400, while the sum is 49.

The spelling of 509516333338 in words is "five hundred nine billion, five hundred sixteen million, three hundred thirty-three thousand, three hundred thirty-eight".