12640241533066 has 16 divisors (see below), whose sum is σ = 21678370116480. Its totient is φ = 5414900213520.

The previous prime is 12640241533027. The next prime is 12640241533069. The reversal of 12640241533066 is 66033514204621.

It is a happy 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, 195479670 + ... + 195544321.

It is an arithmetic number, because the mean of its divisors is an integer number (1354898132280).

Almost surely, 2^{12640241533066} is an apocalyptic number.

12640241533066 is a deficient number, since it is larger than the sum of its proper divisors (9038128583414).

12640241533066 is a wasteful number, since it uses less digits than its factorization.

12640241533066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391026309.

The product of its (nonzero) digits is 622080, while the sum is 43.

Adding to 12640241533066 its reverse (66033514204621), we get a palindrome (78673755737687).

The spelling of 12640241533066 in words is "twelve trillion, six hundred forty billion, two hundred forty-one million, five hundred thirty-three thousand, sixty-six".