52221646845 has 12 divisors (see below), whose sum is σ = 90517521276. Its totient is φ = 27851544960.

The previous prime is 52221646817. The next prime is 52221646861. The reversal of 52221646845 is 54864612225.

52221646845 is a `hidden beast` number, since 522 + 2 + 1 + 6 + 46 + 84 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15557822361 + 36663824484 = 124731^2 + 191478^2 .

It is not a de Polignac number, because 52221646845 - 2¹² = 52221642749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1160481041 = 52221646845 / (5 + 2 + 2 + 2 + 1 + 6 + 4 + 6 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 52221646845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 580240476 + ... + 580240565.

It is an arithmetic number, because the mean of its divisors is an integer number (7543126773).

Almost surely, 2^52221646845 is an apocalyptic number.

It is an amenable number.

52221646845 is a deficient number, since it is larger than the sum of its proper divisors (38295874431).

52221646845 is a wasteful number, since it uses less digits than its factorization.

52221646845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160481052 (or 1160481049 counting only the distinct ones).

The product of its digits is 921600, while the sum is 45.

The spelling of 52221646845 in words is "fifty-two billion, two hundred twenty-one million, six hundred forty-six thousand, eight hundred forty-five".