11689716523 has 2 divisors, whose sum is σ = 11689716524. Its totient is φ = 11689716522.

The previous prime is 11689716461. The next prime is 11689716529. The reversal of 11689716523 is 32561798611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11689716523 is a prime.

It is not a weakly prime, because it can be changed into another prime (11689716529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5844858261 + 5844858262.

It is an arithmetic number, because the mean of its divisors is an integer number (5844858262).

Almost surely, 2^11689716523 is an apocalyptic number.

11689716523 is a deficient number, since it is larger than the sum of its proper divisors (1).

11689716523 is an equidigital number, since it uses as much as digits as its factorization.

11689716523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The spelling of 11689716523 in words is "eleven billion, six hundred eighty-nine million, seven hundred sixteen thousand, five hundred twenty-three".