81833776 has 20 divisors (see below), whose sum is σ = 158730912. Its totient is φ = 40870976.

The previous prime is 81833771. The next prime is 81833789. The reversal of 81833776 is 67733818.

It is not an unprimeable number, because it can be changed into a prime (81833771) 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, 15330 + ... + 19966.

Almost surely, 2^81833776 is an apocalyptic number.

It is an amenable number.

81833776 is a deficient number, since it is larger than the sum of its proper divisors (76897136).

81833776 is a wasteful number, since it uses less digits than its factorization.

81833776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5748 (or 5742 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 81833776 is about 9046.2022970968. The cubic root of 81833776 is about 434.1543901998.

The spelling of 81833776 in words is "eighty-one million, eight hundred thirty-three thousand, seven hundred seventy-six".