40663311064 has 8 divisors (see below), whose sum is σ = 76243708260. Its totient is φ = 20331655528.

The previous prime is 40663311043. The next prime is 40663311067. The reversal of 40663311064 is 46011336604.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40663311067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2541456934 + ... + 2541456949.

Almost surely, 2^40663311064 is an apocalyptic number.

It is an amenable number.

40663311064 is a deficient number, since it is larger than the sum of its proper divisors (35580397196).

40663311064 is a wasteful number, since it uses less digits than its factorization.

40663311064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082913889 (or 5082913885 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 40663311064 its reverse (46011336604), we get a palindrome (86674647668).

The spelling of 40663311064 in words is "forty billion, six hundred sixty-three million, three hundred eleven thousand, sixty-four".