181311081383 has 8 divisors (see below), whose sum is σ = 183488448000. Its totient is φ = 179141735448.

The previous prime is 181311081311. The next prime is 181311081407. The reversal of 181311081383 is 383180113181.

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 181311081383 - 2²⁰ = 181310032807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181311041383) 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 7 ways as a sum of consecutive naturals, for example, 1959683 + ... + 2050116.

It is an arithmetic number, because the mean of its divisors is an integer number (22936056000).

Almost surely, 2^181311081383 is an apocalyptic number.

181311081383 is a deficient number, since it is larger than the sum of its proper divisors (2177366617).

181311081383 is a wasteful number, since it uses less digits than its factorization.

181311081383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010341.

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 181311081383 in words is "one hundred eighty-one billion, three hundred eleven million, eighty-one thousand, three hundred eighty-three".