12640241533065 has 8 divisors (see below), whose sum is σ = 20224386452928. Its totient is φ = 6741462150960.

The previous prime is 12640241533027. The next prime is 12640241533069. The reversal of 12640241533065 is 56033514204621.

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

It is not a de Polignac number, because 12640241533065 - 2⁷ = 12640241532937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12640241533069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421341384421 + ... + 421341384450.

It is an arithmetic number, because the mean of its divisors is an integer number (2528048306616).

Almost surely, 2^{12640241533065} is an apocalyptic number.

12640241533065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12640241533065 is a deficient number, since it is larger than the sum of its proper divisors (7584144919863).

12640241533065 is an equidigital number, since it uses as much as digits as its factorization.

12640241533065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842682768879.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 12640241533065 its reverse (56033514204621), we get a palindrome (68673755737686).

The spelling of 12640241533065 in words is "twelve trillion, six hundred forty billion, two hundred forty-one million, five hundred thirty-three thousand, sixty-five".