8181930471165 has 64 divisors (see below), whose sum is σ = 16703143603200. Its totient is φ = 3758207284800.

The previous prime is 8181930471161. The next prime is 8181930471167. The reversal of 8181930471165 is 5611740391818.

8181930471165 is a `hidden beast` number, since 8 + 1 + 8 + 1 + 9 + 3 + 0 + 471 + 165 = 666.

It is not a de Polignac number, because 8181930471165 - 2² = 8181930471161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181930471161) 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 63 ways as a sum of consecutive naturals, for example, 144964351 + ... + 145020780.

It is an arithmetic number, because the mean of its divisors is an integer number (260986618800).

Almost surely, 2^{8181930471165} is an apocalyptic number.

It is an amenable number.

8181930471165 is an abundant number, since it is smaller than the sum of its proper divisors (8521213132035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8181930471165 is a wasteful number, since it uses less digits than its factorization.

8181930471165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289985175 (or 289985169 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 8181930471165 in words is "eight trillion, one hundred eighty-one billion, nine hundred thirty million, four hundred seventy-one thousand, one hundred sixty-five".