53311322605561 has 2 divisors, whose sum is σ = 53311322605562. Its totient is φ = 53311322605560.

The previous prime is 53311322605549. The next prime is 53311322605577. The reversal of 53311322605561 is 16550622311335.

53311322605561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53302921783225 + 8400822336 = 7300885^2 + 91656^2 .

It is a cyclic number.

It is not a de Polignac number, because 53311322605561 - 2¹⁵ = 53311322572793 is a prime.

It is not a weakly prime, because it can be changed into another prime (53311322605061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26655661302780 + 26655661302781.

It is an arithmetic number, because the mean of its divisors is an integer number (26655661302781).

Almost surely, 2^{53311322605561} is an apocalyptic number.

It is an amenable number.

53311322605561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53311322605561 is an equidigital number, since it uses as much as digits as its factorization.

53311322605561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 43.

Adding to 53311322605561 its reverse (16550622311335), we get a palindrome (69861944916896).

The spelling of 53311322605561 in words is "fifty-three trillion, three hundred eleven billion, three hundred twenty-two million, six hundred five thousand, five hundred sixty-one".