512161543165 has 16 divisors (see below), whose sum is σ = 616462686000. Its totient is φ = 408483758592.

The previous prime is 512161543147. The next prime is 512161543171. The reversal of 512161543165 is 561345161215.

It can be written as a sum of positive squares in 8 ways, for example, as 44714485764 + 467447057401 = 211458^2 + 683701^2 .

It is a cyclic number.

It is not a de Polignac number, because 512161543165 - 2¹⁵ = 512161510397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11412591 + ... + 11457379.

It is an arithmetic number, because the mean of its divisors is an integer number (38528917875).

Almost surely, 2^512161543165 is an apocalyptic number.

It is an amenable number.

512161543165 is a deficient number, since it is larger than the sum of its proper divisors (104301142835).

512161543165 is a wasteful number, since it uses less digits than its factorization.

512161543165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51696.

The product of its digits is 108000, while the sum is 40.

The spelling of 512161543165 in words is "five hundred twelve billion, one hundred sixty-one million, five hundred forty-three thousand, one hundred sixty-five".