553291322581 has 2 divisors, whose sum is σ = 553291322582. Its totient is φ = 553291322580.

The previous prime is 553291322531. The next prime is 553291322599. The reversal of 553291322581 is 185223192355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550460124900 + 2831197681 = 741930^2 + 53209^2 .

It is a cyclic number.

It is not a de Polignac number, because 553291322581 - 2²¹ = 553289225429 is a prime.

It is a super-2 number, since 2×553291322581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553291322531) 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, 276645661290 + 276645661291.

It is an arithmetic number, because the mean of its divisors is an integer number (276645661291).

Almost surely, 2^553291322581 is an apocalyptic number.

It is an amenable number.

553291322581 is a deficient number, since it is larger than the sum of its proper divisors (1).

553291322581 is an equidigital number, since it uses as much as digits as its factorization.

553291322581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 46.

The spelling of 553291322581 in words is "five hundred fifty-three billion, two hundred ninety-one million, three hundred twenty-two thousand, five hundred eighty-one".