81676396 has 12 divisors (see below), whose sum is σ = 143111920. Its totient is φ = 40787280.

The previous prime is 81676391. The next prime is 81676403. The reversal of 81676396 is 69367618.

It is not an unprimeable number, because it can be changed into a prime (81676391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9000 + ... + 15631.

Almost surely, 2^81676396 is an apocalyptic number.

It is an amenable number.

81676396 is a deficient number, since it is larger than the sum of its proper divisors (61435524).

81676396 is a wasteful number, since it uses less digits than its factorization.

81676396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25464 (or 25462 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 81676396 is about 9037.4994329184. The cubic root of 81676396 is about 433.8758944911.

The spelling of 81676396 in words is "eighty-one million, six hundred seventy-six thousand, three hundred ninety-six".