11538611663 has 2 divisors, whose sum is σ = 11538611664. Its totient is φ = 11538611662.

The previous prime is 11538611659. The next prime is 11538611681. The reversal of 11538611663 is 36611683511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11538611663 - 2² = 11538611659 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11538611663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11538611633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5769305831 + 5769305832.

It is an arithmetic number, because the mean of its divisors is an integer number (5769305832).

Almost surely, 2^11538611663 is an apocalyptic number.

11538611663 is a deficient number, since it is larger than the sum of its proper divisors (1).

11538611663 is an equidigital number, since it uses as much as digits as its factorization.

11538611663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The spelling of 11538611663 in words is "eleven billion, five hundred thirty-eight million, six hundred eleven thousand, six hundred sixty-three".