81168352 has 24 divisors (see below), whose sum is σ = 161221536. Its totient is φ = 40223232.

The previous prime is 81168341. The next prime is 81168377. The reversal of 81168352 is 25386118.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7608 + ... + 14839.

It is an arithmetic number, because the mean of its divisors is an integer number (6717564).

Almost surely, 2^81168352 is an apocalyptic number.

It is an amenable number.

81168352 is a deficient number, since it is larger than the sum of its proper divisors (80053184).

81168352 is a wasteful number, since it uses less digits than its factorization.

81168352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22570 (or 22562 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 81168352 is about 9009.3480341254. The cubic root of 81168352 is about 432.9744236556.

The spelling of 81168352 in words is "eighty-one million, one hundred sixty-eight thousand, three hundred fifty-two".