181674551349 has 16 divisors (see below), whose sum is σ = 269211719040. Its totient is φ = 121087461600.

The previous prime is 181674551339. The next prime is 181674551353. The reversal of 181674551349 is 943155476181.

181674551349 is a `hidden beast` number, since 1 + 8 + 16 + 74 + 5 + 513 + 49 = 666.

It is not a de Polignac number, because 181674551349 - 2⁷ = 181674551221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181674551295 and 181674551304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181674551309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687417 + ... + 914270.

It is an arithmetic number, because the mean of its divisors is an integer number (16825732440).

Almost surely, 2^181674551349 is an apocalyptic number.

It is an amenable number.

181674551349 is a deficient number, since it is larger than the sum of its proper divisors (87537167691).

181674551349 is a wasteful number, since it uses less digits than its factorization.

181674551349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605897 (or 1605891 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 181674551349 in words is "one hundred eighty-one billion, six hundred seventy-four million, five hundred fifty-one thousand, three hundred forty-nine".