806638559388 has 12 divisors (see below), whose sum is σ = 1882156638600. Its totient is φ = 268879519792.

The previous prime is 806638559369. The next prime is 806638559411. The reversal of 806638559388 is 883955836608.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33609939963 + ... + 33609939986.

It is an arithmetic number, because the mean of its divisors is an integer number (156846386550).

Almost surely, 2^806638559388 is an apocalyptic number.

It is an amenable number.

806638559388 is an abundant number, since it is smaller than the sum of its proper divisors (1075518079212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806638559388 is a wasteful number, since it uses less digits than its factorization.

806638559388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67219879956 (or 67219879954 counting only the distinct ones).

The product of its (nonzero) digits is 298598400, while the sum is 69.

The spelling of 806638559388 in words is "eight hundred six billion, six hundred thirty-eight million, five hundred fifty-nine thousand, three hundred eighty-eight".