40402791664 has 10 divisors (see below), whose sum is σ = 78280408880. Its totient is φ = 20201395824.

The previous prime is 40402791607. The next prime is 40402791683. The reversal of 40402791664 is 46619720404.

It is a self number, because there is not a number n which added to its sum of digits gives 40402791664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262587224 + ... + 1262587255.

It is an arithmetic number, because the mean of its divisors is an integer number (7828040888).

Almost surely, 2^40402791664 is an apocalyptic number.

It is an amenable number.

40402791664 is a deficient number, since it is larger than the sum of its proper divisors (37877617216).

40402791664 is a wasteful number, since it uses less digits than its factorization.

40402791664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525174487 (or 2525174481 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 40402791664 in words is "forty billion, four hundred two million, seven hundred ninety-one thousand, six hundred sixty-four".