8181731633204 has 6 divisors (see below), whose sum is σ = 14318030358114. Its totient is φ = 4090865816600.

The previous prime is 8181731633189. The next prime is 8181731633213. The reversal of 8181731633204 is 4023361371818.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6334584259600 + 1847147373604 = 2516860^2 + 1359098^2 .

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, 1022716454147 + ... + 1022716454154.

It is an arithmetic number, because the mean of its divisors is an integer number (2386338393019).

Almost surely, 2^{8181731633204} is an apocalyptic number.

It is an amenable number.

8181731633204 is a deficient number, since it is larger than the sum of its proper divisors (6136298724910).

8181731633204 is a wasteful number, since it uses less digits than its factorization.

8181731633204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045432908305 (or 2045432908303 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 8181731633204 in words is "eight trillion, one hundred eighty-one billion, seven hundred thirty-one million, six hundred thirty-three thousand, two hundred four".