81063768 has 16 divisors (see below), whose sum is σ = 202659480. Its totient is φ = 27021248.

The previous prime is 81063761. The next prime is 81063793. The reversal of 81063768 is 86736018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81063761) 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, 1688805 + ... + 1688852.

Almost surely, 2^81063768 is an apocalyptic number.

It is an amenable number.

81063768 is an abundant number, since it is smaller than the sum of its proper divisors (121595712).

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

81063768 is a wasteful number, since it uses less digits than its factorization.

81063768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377666 (or 3377662 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 81063768 is about 9003.5419696917. The cubic root of 81063768 is about 432.7883837423.

The spelling of 81063768 in words is "eighty-one million, sixty-three thousand, seven hundred sixty-eight".