52365609561861 has 24 divisors (see below), whose sum is σ = 75692743642776. Its totient is φ = 34885706227200.

The previous prime is 52365609561857. The next prime is 52365609561911. The reversal of 52365609561861 is 16816590656325.

It is a happy number.

52365609561861 is a `hidden beast` number, since 5 + 2 + 3 + 6 + 5 + 6 + 0 + 9 + 5 + 618 + 6 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11664144308961 + 40701465252900 = 3415281^2 + 6379770^2 .

It is not a de Polignac number, because 52365609561861 - 2² = 52365609561857 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52365609561361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107595681 + ... + 108081273.

It is an arithmetic number, because the mean of its divisors is an integer number (3153864318449).

Almost surely, 2^{52365609561861} is an apocalyptic number.

It is an amenable number.

52365609561861 is a deficient number, since it is larger than the sum of its proper divisors (23327134080915).

52365609561861 is a wasteful number, since it uses less digits than its factorization.

52365609561861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494053 (or 494050 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 63.

The spelling of 52365609561861 in words is "fifty-two trillion, three hundred sixty-five billion, six hundred nine million, five hundred sixty-one thousand, eight hundred sixty-one".