805640038564 has 12 divisors (see below), whose sum is σ = 1409887900764. Its totient is φ = 402814924064.

The previous prime is 805640038523. The next prime is 805640038591. The reversal of 805640038564 is 465830046508.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 487553062500 + 318086976064 = 698250^2 + 563992^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906259 + ... + 1559674.

It is an arithmetic number, because the mean of its divisors is an integer number (117490658397).

Almost surely, 2^805640038564 is an apocalyptic number.

It is an amenable number.

805640038564 is a deficient number, since it is larger than the sum of its proper divisors (604247862200).

805640038564 is a wasteful number, since it uses less digits than its factorization.

805640038564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547614 (or 2547612 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 805640038564 in words is "eight hundred five billion, six hundred forty million, thirty-eight thousand, five hundred sixty-four".