80982656 has 16 divisors (see below), whose sum is σ = 161332890. Its totient is φ = 40491264.

The previous prime is 80982653. The next prime is 80982661. The reversal of 80982656 is 65628908.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 270400 = 8984^2 + 520^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (80982653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316211 + ... + 316466.

Almost surely, 2^80982656 is an apocalyptic number.

It is an amenable number.

80982656 is a deficient number, since it is larger than the sum of its proper divisors (80350234).

80982656 is an equidigital number, since it uses as much as digits as its factorization.

80982656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632691 (or 632679 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 80982656 is about 8999.0363928590. The cubic root of 80982656 is about 432.6439869414.

The spelling of 80982656 in words is "eighty million, nine hundred eighty-two thousand, six hundred fifty-six".