11689716481 has 16 divisors (see below), whose sum is σ = 11916337680. Its totient is φ = 11465625600.

The previous prime is 11689716461. The next prime is 11689716523. The reversal of 11689716481 is 18461798611.

It can be written as a sum of positive squares in 8 ways, for example, as 7012387600 + 4677328881 = 83740^2 + 68391^2 .

It is a cyclic number.

It is not a de Polignac number, because 11689716481 - 2³³ = 3099781889 is a prime.

It is a super-2 number, since 2×11689716481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11689716421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6489781 + ... + 6491581.

It is an arithmetic number, because the mean of its divisors is an integer number (744771105).

Almost surely, 2^11689716481 is an apocalyptic number.

It is an amenable number.

11689716481 is a deficient number, since it is larger than the sum of its proper divisors (226621199).

11689716481 is a wasteful number, since it uses less digits than its factorization.

11689716481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436.

The product of its digits is 580608, while the sum is 52.

The spelling of 11689716481 in words is "eleven billion, six hundred eighty-nine million, seven hundred sixteen thousand, four hundred eighty-one".