52201681561 has 2 divisors, whose sum is σ = 52201681562. Its totient is φ = 52201681560.

The previous prime is 52201681529. The next prime is 52201681573. The reversal of 52201681561 is 16518610225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28648947600 + 23552733961 = 169260^2 + 153469^2 .

It is a cyclic number.

It is not a de Polignac number, because 52201681561 - 2⁵ = 52201681529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52201681561.

It is not a weakly prime, because it can be changed into another prime (52201681591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26100840780 + 26100840781.

It is an arithmetic number, because the mean of its divisors is an integer number (26100840781).

Almost surely, 2^52201681561 is an apocalyptic number.

It is an amenable number.

52201681561 is a deficient number, since it is larger than the sum of its proper divisors (1).

52201681561 is an equidigital number, since it uses as much as digits as its factorization.

52201681561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 52201681561 in words is "fifty-two billion, two hundred one million, six hundred eighty-one thousand, five hundred sixty-one".