12640565111 has 2 divisors, whose sum is σ = 12640565112. Its totient is φ = 12640565110.

The previous prime is 12640565107. The next prime is 12640565123. The reversal of 12640565111 is 11156504621.

It is a weak prime.

It is an emirp because it is prime and its reverse (11156504621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12640565111 - 2² = 12640565107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12640565131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320282555 + 6320282556.

It is an arithmetic number, because the mean of its divisors is an integer number (6320282556).

Almost surely, 2^12640565111 is an apocalyptic number.

12640565111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640565111 is an equidigital number, since it uses as much as digits as its factorization.

12640565111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 12640565111 in words is "twelve billion, six hundred forty million, five hundred sixty-five thousand, one hundred eleven".