11621776717 has 2 divisors, whose sum is σ = 11621776718. Its totient is φ = 11621776716.

The previous prime is 11621776681. The next prime is 11621776741. The reversal of 11621776717 is 71767712611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7834728196 + 3787048521 = 88514^2 + 61539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11621776717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11621771717) 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, 5810888358 + 5810888359.

It is an arithmetic number, because the mean of its divisors is an integer number (5810888359).

Almost surely, 2^11621776717 is an apocalyptic number.

It is an amenable number.

11621776717 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621776717 is an equidigital number, since it uses as much as digits as its factorization.

11621776717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172872, while the sum is 46.

The spelling of 11621776717 in words is "eleven billion, six hundred twenty-one million, seven hundred seventy-six thousand, seven hundred seventeen".