512465561689 has 3 divisors (see below), whose sum is σ = 512466277557. Its totient is φ = 512464845822.

The previous prime is 512465561677. The next prime is 512465561701. The reversal of 512465561689 is 986165564215.

The square root of 512465561689 is 715867.

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 an interprime number because it is at equal distance from previous prime (512465561677) and next prime (512465561701).

It is not a de Polignac number, because 512465561689 - 2²⁷ = 512331343961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512465561609) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 357934 + ... + 1073800.

It is an arithmetic number, because the mean of its divisors is an integer number (170822092519).

Almost surely, 2^512465561689 is an apocalyptic number.

512465561689 is the 715867-th square number.

512465561689 is the 357934-th centered octagonal number.

It is an amenable number.

512465561689 is a deficient number, since it is larger than the sum of its proper divisors (715868).

512465561689 is an frugal number, since it uses more digits than its factorization.

512465561689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431734 (or 715867 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 58.

The spelling of 512465561689 in words is "five hundred twelve billion, four hundred sixty-five million, five hundred sixty-one thousand, six hundred eighty-nine".