181123425403 has 8 divisors (see below), whose sum is σ = 181954301760. Its totient is φ = 180293205120.

The previous prime is 181123425389. The next prime is 181123425421. The reversal of 181123425403 is 304524321181.

181123425403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181123425403 - 2²¹ = 181121328251 is a prime.

It is a super-2 number, since 2×181123425403² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181123425803) 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 in 7 ways as a sum of consecutive naturals, for example, 393726 + ... + 719212.

It is an arithmetic number, because the mean of its divisors is an integer number (22744287720).

Almost surely, 2^181123425403 is an apocalyptic number.

181123425403 is a deficient number, since it is larger than the sum of its proper divisors (830876357).

181123425403 is a wasteful number, since it uses less digits than its factorization.

181123425403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328037.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 181123425403 its reverse (304524321181), we get a palindrome (485647746584).

The spelling of 181123425403 in words is "one hundred eighty-one billion, one hundred twenty-three million, four hundred twenty-five thousand, four hundred three".