52281205649 has 2 divisors, whose sum is σ = 52281205650. Its totient is φ = 52281205648.

The previous prime is 52281205633. The next prime is 52281205661. The reversal of 52281205649 is 94650218225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52272591424 + 8614225 = 228632^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 52281205649 - 2⁴ = 52281205633 is a prime.

It is a super-2 number, since 2×52281205649² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52281205549) 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, 26140602824 + 26140602825.

It is an arithmetic number, because the mean of its divisors is an integer number (26140602825).

Almost surely, 2^52281205649 is an apocalyptic number.

It is an amenable number.

52281205649 is a deficient number, since it is larger than the sum of its proper divisors (1).

52281205649 is an equidigital number, since it uses as much as digits as its factorization.

52281205649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 52281205649 in words is "fifty-two billion, two hundred eighty-one million, two hundred five thousand, six hundred forty-nine".