512161510561 has 4 divisors (see below), whose sum is σ = 512854558000. Its totient is φ = 511468463124.

The previous prime is 512161510559. The next prime is 512161510589. The reversal of 512161510561 is 165015161215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 512161510561 - 2¹ = 512161510559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512161510501) 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, 346522611 + ... + 346524088.

It is an arithmetic number, because the mean of its divisors is an integer number (128213639500).

Almost surely, 2^512161510561 is an apocalyptic number.

It is an amenable number.

512161510561 is a deficient number, since it is larger than the sum of its proper divisors (693047439).

512161510561 is an equidigital number, since it uses as much as digits as its factorization.

512161510561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693047438.

The product of its (nonzero) digits is 9000, while the sum is 34.

Adding to 512161510561 its reverse (165015161215), we get a palindrome (677176671776).

The spelling of 512161510561 in words is "five hundred twelve billion, one hundred sixty-one million, five hundred ten thousand, five hundred sixty-one".