40256865808 has 10 divisors (see below), whose sum is σ = 77997677534. Its totient is φ = 20128432896.

The previous prime is 40256865797. The next prime is 40256865811. The reversal of 40256865808 is 80856865204.

40256865808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 31388500224 + 8868365584 = 177168^2 + 94172^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258027041 + ... + 1258027072.

Almost surely, 2^40256865808 is an apocalyptic number.

It is an amenable number.

40256865808 is a deficient number, since it is larger than the sum of its proper divisors (37740811726).

40256865808 is a wasteful number, since it uses less digits than its factorization.

40256865808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516054121 (or 2516054115 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 52.

The spelling of 40256865808 in words is "forty billion, two hundred fifty-six million, eight hundred sixty-five thousand, eight hundred eight".