11656589677 has 2 divisors, whose sum is σ = 11656589678. Its totient is φ = 11656589676.

The previous prime is 11656589657. The next prime is 11656589689. The reversal of 11656589677 is 77698565611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8996712201 + 2659877476 = 94851^2 + 51574^2 .

It is a cyclic number.

It is not a de Polignac number, because 11656589677 - 2¹⁹ = 11656065389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11656589617) 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, 5828294838 + 5828294839.

It is an arithmetic number, because the mean of its divisors is an integer number (5828294839).

Almost surely, 2^11656589677 is an apocalyptic number.

It is an amenable number.

11656589677 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656589677 is an equidigital number, since it uses as much as digits as its factorization.

11656589677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19051200, while the sum is 61.

The spelling of 11656589677 in words is "eleven billion, six hundred fifty-six million, five hundred eighty-nine thousand, six hundred seventy-seven".