81482168 has 8 divisors (see below), whose sum is σ = 152779080. Its totient is φ = 40741080.

The previous prime is 81482143. The next prime is 81482171. The reversal of 81482168 is 86128418.

It is a tau number, because it is divible by the number of its divisors (8).

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, 5092628 + ... + 5092643.

It is an arithmetic number, because the mean of its divisors is an integer number (19097385).

Almost surely, 2^81482168 is an apocalyptic number.

It is an amenable number.

81482168 is a deficient number, since it is larger than the sum of its proper divisors (71296912).

81482168 is a wasteful number, since it uses less digits than its factorization.

81482168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185277 (or 10185273 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 81482168 is about 9026.7473654689. The cubic root of 81482168 is about 433.5316998442.

The spelling of 81482168 in words is "eighty-one million, four hundred eighty-two thousand, one hundred sixty-eight".