181914164 has 6 divisors (see below), whose sum is σ = 318349794. Its totient is φ = 90957080.

The previous prime is 181914119. The next prime is 181914181. The reversal of 181914164 is 461419181.

It can be written as a sum of positive squares in only one way, i.e., 142324900 + 39589264 = 11930^2 + 6292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22739267 + ... + 22739274.

It is an arithmetic number, because the mean of its divisors is an integer number (53058299).

Almost surely, 2^181914164 is an apocalyptic number.

It is an amenable number.

181914164 is a deficient number, since it is larger than the sum of its proper divisors (136435630).

181914164 is a wasteful number, since it uses less digits than its factorization.

181914164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45478545 (or 45478543 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 181914164 is about 13487.5558942308. Note that the first 3 decimals coincide. The cubic root of 181914164 is about 566.6160057747.

The spelling of 181914164 in words is "one hundred eighty-one million, nine hundred fourteen thousand, one hundred sixty-four".