40809644488 has 16 divisors (see below), whose sum is σ = 76536138780. Its totient is φ = 20400007488.

The previous prime is 40809644467. The next prime is 40809644521. The reversal of 40809644488 is 88444690804.

It can be written as a sum of positive squares in 2 ways, for example, as 40255607044 + 554037444 = 200638^2 + 23538^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 565695 + ... + 633742.

Almost surely, 2^40809644488 is an apocalyptic number.

It is an amenable number.

40809644488 is a deficient number, since it is larger than the sum of its proper divisors (35726494292).

40809644488 is a wasteful number, since it uses less digits than its factorization.

40809644488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203696 (or 1203692 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 55.

The spelling of 40809644488 in words is "forty billion, eight hundred nine million, six hundred forty-four thousand, four hundred eighty-eight".