11565610643 has 2 divisors, whose sum is σ = 11565610644. Its totient is φ = 11565610642.

The previous prime is 11565610613. The next prime is 11565610703. The reversal of 11565610643 is 34601656511.

It is a weak prime.

It is an emirp because it is prime and its reverse (34601656511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11565610643 - 2⁶ = 11565610579 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11565610597 and 11565610606.

It is not a weakly prime, because it can be changed into another prime (11565610613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782805321 + 5782805322.

It is an arithmetic number, because the mean of its divisors is an integer number (5782805322).

Almost surely, 2^11565610643 is an apocalyptic number.

11565610643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565610643 is an equidigital number, since it uses as much as digits as its factorization.

11565610643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 11565610643 in words is "eleven billion, five hundred sixty-five million, six hundred ten thousand, six hundred forty-three".