181810434453 has 4 divisors (see below), whose sum is σ = 242413912608. Its totient is φ = 121206956300.

The previous prime is 181810434439. The next prime is 181810434461. The reversal of 181810434453 is 354434018181.

181810434453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 181810434453 - 2¹³ = 181810426261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181810434053) 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 3 ways as a sum of consecutive naturals, for example, 30301739073 + ... + 30301739078.

It is an arithmetic number, because the mean of its divisors is an integer number (60603478152).

Almost surely, 2^181810434453 is an apocalyptic number.

It is an amenable number.

181810434453 is a deficient number, since it is larger than the sum of its proper divisors (60603478155).

181810434453 is an equidigital number, since it uses as much as digits as its factorization.

181810434453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60603478154.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 181810434453 in words is "one hundred eighty-one billion, eight hundred ten million, four hundred thirty-four thousand, four hundred fifty-three".