518811969 has 16 divisors (see below), whose sum is σ = 752646272. Its totient is φ = 315975168.

The previous prime is 518811959. The next prime is 518811971. The reversal of 518811969 is 969118815.

It is not a de Polignac number, because 518811969 - 2¹³ = 518803777 is a prime.

It is a super-2 number, since 2×518811969² = 538331718355313922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518811959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64789 + ... + 72354.

It is an arithmetic number, because the mean of its divisors is an integer number (47040392).

Almost surely, 2^518811969 is an apocalyptic number.

It is an amenable number.

518811969 is a deficient number, since it is larger than the sum of its proper divisors (233834303).

518811969 is a wasteful number, since it uses less digits than its factorization.

518811969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137256.

The product of its digits is 155520, while the sum is 48.

The square root of 518811969 is about 22777.4443035210. Note that the first 3 decimals coincide. The cubic root of 518811969 is about 803.5322813025.

The spelling of 518811969 in words is "five hundred eighteen million, eight hundred eleven thousand, nine hundred sixty-nine".