519678066769 has 3 divisors (see below), whose sum is σ = 519678787657. Its totient is φ = 519677345882.

The previous prime is 519678066757. The next prime is 519678066839. The reversal of 519678066769 is 967660876915.

The square root of 519678066769 is 720887.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 519678066769 - 2¹⁷ = 519677935697 is a prime.

It is a super-2 number, since 2×519678066769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 519678066698 and 519678066707.

It is not an unprimeable number, because it can be changed into a prime (519678066749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 360444 + ... + 1081330.

Almost surely, 2^519678066769 is an apocalyptic number.

519678066769 is the 720887-th square number.

519678066769 is the 360444-th centered octagonal number.

It is an amenable number.

519678066769 is a deficient number, since it is larger than the sum of its proper divisors (720888).

519678066769 is an frugal number, since it uses more digits than its factorization.

519678066769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441774 (or 720887 counting only the distinct ones).

The product of its (nonzero) digits is 205752960, while the sum is 70.

The spelling of 519678066769 in words is "five hundred nineteen billion, six hundred seventy-eight million, sixty-six thousand, seven hundred sixty-nine".