181123425803 has 2 divisors, whose sum is σ = 181123425804. Its totient is φ = 181123425802.

The previous prime is 181123425793. The next prime is 181123425827. The reversal of 181123425803 is 308524321181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 181123425803 - 2⁸ = 181123425547 is a prime.

It is a super-2 number, since 2×181123425803² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (181123425883) 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, 90561712901 + 90561712902.

It is an arithmetic number, because the mean of its divisors is an integer number (90561712902).

Almost surely, 2^181123425803 is an apocalyptic number.

181123425803 is a deficient number, since it is larger than the sum of its proper divisors (1).

181123425803 is an equidigital number, since it uses as much as digits as its factorization.

181123425803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

Adding to 181123425803 its reverse (308524321181), we get a palindrome (489647746984).

The spelling of 181123425803 in words is "one hundred eighty-one billion, one hundred twenty-three million, four hundred twenty-five thousand, eight hundred three".