40641565768 has 8 divisors (see below), whose sum is σ = 76202935830. Its totient is φ = 20320782880.

The previous prime is 40641565751. The next prime is 40641565771. The reversal of 40641565768 is 86756514604.

It can be written as a sum of positive squares in only one way, i.e., 30303150084 + 10338415684 = 174078^2 + 101678^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2540097853 + ... + 2540097868.

Almost surely, 2^40641565768 is an apocalyptic number.

It is an amenable number.

40641565768 is a deficient number, since it is larger than the sum of its proper divisors (35561370062).

40641565768 is a wasteful number, since it uses less digits than its factorization.

40641565768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080195727 (or 5080195723 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 40641565768 in words is "forty billion, six hundred forty-one million, five hundred sixty-five thousand, seven hundred sixty-eight".