52138537361 has 2 divisors, whose sum is σ = 52138537362. Its totient is φ = 52138537360.

The previous prime is 52138537337. The next prime is 52138537411. The reversal of 52138537361 is 16373583125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31842261136 + 20296276225 = 178444^2 + 142465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52138537361 is a prime.

It is not a weakly prime, because it can be changed into another prime (52138537961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26069268680 + 26069268681.

It is an arithmetic number, because the mean of its divisors is an integer number (26069268681).

Almost surely, 2^52138537361 is an apocalyptic number.

It is an amenable number.

52138537361 is a deficient number, since it is larger than the sum of its proper divisors (1).

52138537361 is an equidigital number, since it uses as much as digits as its factorization.

52138537361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The spelling of 52138537361 in words is "fifty-two billion, one hundred thirty-eight million, five hundred thirty-seven thousand, three hundred sixty-one".