181453472401349 has 4 divisors (see below), whose sum is σ = 181919933770380. Its totient is φ = 180987011032320.

The previous prime is 181453472401337. The next prime is 181453472401507. The reversal of 181453472401349 is 943104274354181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62472978880225 + 118980493521124 = 7903985^2 + 10907818^2 .

It is a cyclic number.

It is not a de Polignac number, because 181453472401349 - 2²⁸ = 181453203965893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181453472401294 and 181453472401303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181453472401249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233230683932 + ... + 233230684709.

It is an arithmetic number, because the mean of its divisors is an integer number (45479983442595).

Almost surely, 2^{181453472401349} is an apocalyptic number.

It is an amenable number.

181453472401349 is a deficient number, since it is larger than the sum of its proper divisors (466461369031).

181453472401349 is an equidigital number, since it uses as much as digits as its factorization.

181453472401349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466461369030.

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 181453472401349 in words is "one hundred eighty-one trillion, four hundred fifty-three billion, four hundred seventy-two million, four hundred one thousand, three hundred forty-nine".