81056368 has 20 divisors (see below), whose sum is σ = 157188600. Its totient is φ = 40491584.

The previous prime is 81056329. The next prime is 81056429. The reversal of 81056368 is 86365018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28683 + ... + 31381.

It is an arithmetic number, because the mean of its divisors is an integer number (7859430).

Almost surely, 2^81056368 is an apocalyptic number.

It is an amenable number.

81056368 is a deficient number, since it is larger than the sum of its proper divisors (76132232).

81056368 is a wasteful number, since it uses less digits than its factorization.

81056368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584 (or 4578 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 81056368 is about 9003.1310109317. The cubic root of 81056368 is about 432.7752141452.

The spelling of 81056368 in words is "eighty-one million, fifty-six thousand, three hundred sixty-eight".