181404953473 has 8 divisors (see below), whose sum is σ = 184162381760. Its totient is φ = 178648992720.

The previous prime is 181404953383. The next prime is 181404953491. The reversal of 181404953473 is 374359404181.

181404953473 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 181404953473 - 2²¹ = 181402856321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181404953573) 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, 116493 + ... + 613498.

It is an arithmetic number, because the mean of its divisors is an integer number (23020297720).

Almost surely, 2^181404953473 is an apocalyptic number.

It is an amenable number.

181404953473 is a deficient number, since it is larger than the sum of its proper divisors (2757428287).

181404953473 is an equidigital number, since it uses as much as digits as its factorization.

181404953473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733767.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 181404953473 in words is "one hundred eighty-one billion, four hundred four million, nine hundred fifty-three thousand, four hundred seventy-three".