80823646 has 4 divisors (see below), whose sum is σ = 121235472. Its totient is φ = 40411822.

The previous prime is 80823643. The next prime is 80823653. The reversal of 80823646 is 64632808.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80823643) 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 as a sum of consecutive naturals, namely, 20205910 + ... + 20205913.

It is an arithmetic number, because the mean of its divisors is an integer number (30308868).

Almost surely, 2^80823646 is an apocalyptic number.

80823646 is a deficient number, since it is larger than the sum of its proper divisors (40411826).

80823646 is a wasteful number, since it uses less digits than its factorization.

80823646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40411825.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 80823646 is about 8990.1972169692. The cubic root of 80823646 is about 432.3606349282.

The spelling of 80823646 in words is "eighty million, eight hundred twenty-three thousand, six hundred forty-six".