81362168 has 16 divisors (see below), whose sum is σ = 157815000. Its totient is φ = 39278176.

The previous prime is 81362167. The next prime is 81362189. The reversal of 81362168 is 86126318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81362167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175118 + ... + 175581.

Almost surely, 2^81362168 is an apocalyptic number.

It is an amenable number.

81362168 is a deficient number, since it is larger than the sum of its proper divisors (76452832).

81362168 is a wasteful number, since it uses less digits than its factorization.

81362168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350734 (or 350730 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 81362168 is about 9020.0980039022. The cubic root of 81362168 is about 433.3187724233.

The spelling of 81362168 in words is "eighty-one million, three hundred sixty-two thousand, one hundred sixty-eight".