52856185517 has 2 divisors, whose sum is σ = 52856185518. Its totient is φ = 52856185516.

The previous prime is 52856185451. The next prime is 52856185589. The reversal of 52856185517 is 71558165825.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49423514596 + 3432670921 = 222314^2 + 58589^2 .

It is a cyclic number.

It is not a de Polignac number, because 52856185517 - 2¹⁴ = 52856169133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52856181517) 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, 26428092758 + 26428092759.

It is an arithmetic number, because the mean of its divisors is an integer number (26428092759).

Almost surely, 2^52856185517 is an apocalyptic number.

It is an amenable number.

52856185517 is a deficient number, since it is larger than the sum of its proper divisors (1).

52856185517 is an equidigital number, since it uses as much as digits as its factorization.

52856185517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360000, while the sum is 53.

The spelling of 52856185517 in words is "fifty-two billion, eight hundred fifty-six million, one hundred eighty-five thousand, five hundred seventeen".