423058581581 has 2 divisors, whose sum is σ = 423058581582. Its totient is φ = 423058581580.

The previous prime is 423058581557. The next prime is 423058581643. The reversal of 423058581581 is 185185850324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338124805225 + 84933776356 = 581485^2 + 291434^2 .

It is a cyclic number.

It is not a de Polignac number, because 423058581581 - 2¹⁴ = 423058565197 is a prime.

It is a super-2 number, since 2×423058581581² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423058589581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211529290790 + 211529290791.

It is an arithmetic number, because the mean of its divisors is an integer number (211529290791).

Almost surely, 2^423058581581 is an apocalyptic number.

It is an amenable number.

423058581581 is a deficient number, since it is larger than the sum of its proper divisors (1).

423058581581 is an equidigital number, since it uses as much as digits as its factorization.

423058581581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536000, while the sum is 50.

The spelling of 423058581581 in words is "four hundred twenty-three billion, fifty-eight million, five hundred eighty-one thousand, five hundred eighty-one".