11531562611 has 2 divisors, whose sum is σ = 11531562612. Its totient is φ = 11531562610.

The previous prime is 11531562571. The next prime is 11531562619. The reversal of 11531562611 is 11626513511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11531562611 - 2⁶ = 11531562547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11531562619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5765781305 + 5765781306.

It is an arithmetic number, because the mean of its divisors is an integer number (5765781306).

Almost surely, 2^11531562611 is an apocalyptic number.

11531562611 is a deficient number, since it is larger than the sum of its proper divisors (1).

11531562611 is an equidigital number, since it uses as much as digits as its factorization.

11531562611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The spelling of 11531562611 in words is "eleven billion, five hundred thirty-one million, five hundred sixty-two thousand, six hundred eleven".