512665017793 has 4 divisors (see below), whose sum is σ = 517950224260. Its totient is φ = 507379811328.

The previous prime is 512665017757. The next prime is 512665017847. The reversal of 512665017793 is 397710566215.

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

It can be written as a sum of positive squares in 2 ways, for example, as 158012610064 + 354652407729 = 397508^2 + 595527^2 .

It is a cyclic number.

It is not a de Polignac number, because 512665017793 - 2²⁵ = 512631463361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 512665017793.

It is not an unprimeable number, because it can be changed into a prime (512665017703) 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, 2642603088 + ... + 2642603281.

It is an arithmetic number, because the mean of its divisors is an integer number (129487556065).

Almost surely, 2^512665017793 is an apocalyptic number.

It is an amenable number.

512665017793 is a deficient number, since it is larger than the sum of its proper divisors (5285206467).

512665017793 is an equidigital number, since it uses as much as digits as its factorization.

512665017793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285206466.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 512665017793 in words is "five hundred twelve billion, six hundred sixty-five million, seventeen thousand, seven hundred ninety-three".