519681980539 has 4 divisors (see below), whose sum is σ = 550251508824. Its totient is φ = 489112452256.

The previous prime is 519681980533. The next prime is 519681980551. The reversal of 519681980539 is 935089186915.

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

It is a cyclic number.

It is not a de Polignac number, because 519681980539 - 2¹³ = 519681972347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (519681980533) 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, 15284764117 + ... + 15284764150.

It is an arithmetic number, because the mean of its divisors is an integer number (137562877206).

Almost surely, 2^519681980539 is an apocalyptic number.

519681980539 is a deficient number, since it is larger than the sum of its proper divisors (30569528285).

519681980539 is a wasteful number, since it uses less digits than its factorization.

519681980539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30569528284.

The product of its (nonzero) digits is 20995200, while the sum is 64.

The spelling of 519681980539 in words is "five hundred nineteen billion, six hundred eighty-one million, nine hundred eighty thousand, five hundred thirty-nine".