5185200512561 has 4 divisors (see below), whose sum is σ = 5202897442932. Its totient is φ = 5167503582192.

The previous prime is 5185200512537. The next prime is 5185200512573. The reversal of 5185200512561 is 1652150025815.

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 2277817451536 + 2907383061025 = 1509244^2 + 1705105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5185200512561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5185200512521) 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, 8848464746 + ... + 8848465331.

It is an arithmetic number, because the mean of its divisors is an integer number (1300724360733).

Almost surely, 2^{5185200512561} is an apocalyptic number.

It is an amenable number.

5185200512561 is a deficient number, since it is larger than the sum of its proper divisors (17696930371).

5185200512561 is a wasteful number, since it uses less digits than its factorization.

5185200512561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17696930370.

The product of its (nonzero) digits is 120000, while the sum is 41.

The spelling of 5185200512561 in words is "five trillion, one hundred eighty-five billion, two hundred million, five hundred twelve thousand, five hundred sixty-one".