512897543969 has 4 divisors (see below), whose sum is σ = 519923537796. Its totient is φ = 505871550144.

The previous prime is 512897543857. The next prime is 512897544013. The reversal of 512897543969 is 969345798215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969345798215 = 5 ⋅193869159643.

It can be written as a sum of positive squares in 2 ways, for example, as 239067213025 + 273830330944 = 488945^2 + 523288^2 .

It is a cyclic number.

It is not a de Polignac number, because 512897543969 - 2²⁰ = 512896495393 is a prime.

It is a super-2 number, since 2×512897543969² (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 = 512897543899 and 512897543908.

It is not an unprimeable number, because it can be changed into a prime (512897543569) 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, 3512996804 + ... + 3512996949.

It is an arithmetic number, because the mean of its divisors is an integer number (129980884449).

Almost surely, 2^512897543969 is an apocalyptic number.

It is an amenable number.

512897543969 is a deficient number, since it is larger than the sum of its proper divisors (7025993827).

512897543969 is an equidigital number, since it uses as much as digits as its factorization.

512897543969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7025993826.

The product of its digits is 146966400, while the sum is 68.

The spelling of 512897543969 in words is "five hundred twelve billion, eight hundred ninety-seven million, five hundred forty-three thousand, nine hundred sixty-nine".