40635345064 has 8 divisors (see below), whose sum is σ = 76191272010. Its totient is φ = 20317672528.

The previous prime is 40635345061. The next prime is 40635345077. The reversal of 40635345064 is 46054353604.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34051320900 + 6584024164 = 184530^2 + 81142^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40635345061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2539709059 + ... + 2539709074.

Almost surely, 2^40635345064 is an apocalyptic number.

It is an amenable number.

40635345064 is a deficient number, since it is larger than the sum of its proper divisors (35555926946).

40635345064 is a wasteful number, since it uses less digits than its factorization.

40635345064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5079418139 (or 5079418135 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 40635345064 its reverse (46054353604), we get a palindrome (86689698668).

The spelling of 40635345064 in words is "forty billion, six hundred thirty-five million, three hundred forty-five thousand, sixty-four".