11689716461 has 2 divisors, whose sum is σ = 11689716462. Its totient is φ = 11689716460.

The previous prime is 11689716457. The next prime is 11689716523. The reversal of 11689716461 is 16461798611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9466122436 + 2223594025 = 97294^2 + 47155^2 .

It is a cyclic number.

It is not a de Polignac number, because 11689716461 - 2² = 11689716457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11689716421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5844858230 + 5844858231.

It is an arithmetic number, because the mean of its divisors is an integer number (5844858231).

Almost surely, 2^11689716461 is an apocalyptic number.

It is an amenable number.

11689716461 is a deficient number, since it is larger than the sum of its proper divisors (1).

11689716461 is an equidigital number, since it uses as much as digits as its factorization.

11689716461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The spelling of 11689716461 in words is "eleven billion, six hundred eighty-nine million, seven hundred sixteen thousand, four hundred sixty-one".