80644688 has 20 divisors (see below), whose sum is σ = 156546900. Its totient is φ = 40245504.

The previous prime is 80644673. The next prime is 80644699. The reversal of 80644688 is 88644608.

It can be written as a sum of positive squares in 2 ways, for example, as 35378704 + 45265984 = 5948^2 + 6728^2 .

It is a congruent number.

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, 4388 + ... + 13436.

It is an arithmetic number, because the mean of its divisors is an integer number (7827345).

Almost surely, 2^80644688 is an apocalyptic number.

It is an amenable number.

80644688 is a deficient number, since it is larger than the sum of its proper divisors (75902212).

80644688 is a wasteful number, since it uses less digits than its factorization.

80644688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9614 (or 9608 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 80644688 is about 8980.2387496102. The cubic root of 80644688 is about 432.0412912064.

The spelling of 80644688 in words is "eighty million, six hundred forty-four thousand, six hundred eighty-eight".