513559388161 has 4 divisors (see below), whose sum is σ = 515387001924. Its totient is φ = 511731774400.

The previous prime is 513559388137. The next prime is 513559388207. The reversal of 513559388161 is 161883955315.

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 129848519025 + 383710869136 = 360345^2 + 619444^2 .

It is a cyclic number.

It is not a de Polignac number, because 513559388161 - 2⁷ = 513559388033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513559380161) 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, 913806460 + ... + 913807021.

It is an arithmetic number, because the mean of its divisors is an integer number (128846750481).

Almost surely, 2^513559388161 is an apocalyptic number.

It is an amenable number.

513559388161 is a deficient number, since it is larger than the sum of its proper divisors (1827613763).

513559388161 is a wasteful number, since it uses less digits than its factorization.

513559388161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827613762.

The product of its digits is 3888000, while the sum is 55.

The spelling of 513559388161 in words is "five hundred thirteen billion, five hundred fifty-nine million, three hundred eighty-eight thousand, one hundred sixty-one".