40536446064 has 40 divisors (see below), whose sum is σ = 107154486912. Its totient is φ = 13197912000.

The previous prime is 40536446057. The next prime is 40536446077. The reversal of 40536446064 is 46064463504.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9817812 + ... + 9821939.

Almost surely, 2^40536446064 is an apocalyptic number.

It is an amenable number.

40536446064 is an abundant number, since it is smaller than the sum of its proper divisors (66618040848).

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

40536446064 is a wasteful number, since it uses less digits than its factorization.

40536446064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19639805 (or 19639799 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 40536446064 in words is "forty billion, five hundred thirty-six million, four hundred forty-six thousand, sixty-four".