11821968677 has 2 divisors, whose sum is σ = 11821968678. Its totient is φ = 11821968676.

The previous prime is 11821968661. The next prime is 11821968707. The reversal of 11821968677 is 77686912811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8774818276 + 3047150401 = 93674^2 + 55201^2 .

It is a cyclic number.

It is not a de Polignac number, because 11821968677 - 2⁴ = 11821968661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11821968647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910984338 + 5910984339.

It is an arithmetic number, because the mean of its divisors is an integer number (5910984339).

Almost surely, 2^11821968677 is an apocalyptic number.

It is an amenable number.

11821968677 is a deficient number, since it is larger than the sum of its proper divisors (1).

11821968677 is an equidigital number, since it uses as much as digits as its factorization.

11821968677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 56.

The spelling of 11821968677 in words is "eleven billion, eight hundred twenty-one million, nine hundred sixty-eight thousand, six hundred seventy-seven".