80642636 has 12 divisors (see below), whose sum is σ = 141320760. Its totient is φ = 40265280.

The previous prime is 80642629. The next prime is 80642651. The reversal of 80642636 is 63624608.

It is a junction number, because it is equal to n+sod(n) for n = 80642596 and 80642605.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10685 + ... + 16596.

It is an arithmetic number, because the mean of its divisors is an integer number (11776730).

Almost surely, 2^80642636 is an apocalyptic number.

It is an amenable number.

80642636 is a deficient number, since it is larger than the sum of its proper divisors (60678124).

80642636 is a wasteful number, since it uses less digits than its factorization.

80642636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28024 (or 28022 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 80642636 is about 8980.1244980234. The cubic root of 80642636 is about 432.0376267524.

The spelling of 80642636 in words is "eighty million, six hundred forty-two thousand, six hundred thirty-six".