40646336065 has 8 divisors (see below), whose sum is σ = 51644756520. Its totient is φ = 30604300032.

The previous prime is 40646336039. The next prime is 40646336077. The reversal of 40646336065 is 56063364604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5898393601 + 34747942464 = 76801^2 + 186408^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40646336065 - 2⁹ = 40646335553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239096010 + ... + 239096179.

It is an arithmetic number, because the mean of its divisors is an integer number (6455594565).

Almost surely, 2^40646336065 is an apocalyptic number.

It is an amenable number.

40646336065 is a deficient number, since it is larger than the sum of its proper divisors (10998420455).

40646336065 is a wasteful number, since it uses less digits than its factorization.

40646336065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478192211.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 40646336065 in words is "forty billion, six hundred forty-six million, three hundred thirty-six thousand, sixty-five".