77243812211 has 2 divisors, whose sum is σ = 77243812212. Its totient is φ = 77243812210.

The previous prime is 77243812193. The next prime is 77243812279. The reversal of 77243812211 is 11221834277.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77243812211 is a prime.

It is not a weakly prime, because it can be changed into another prime (77243842211) 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, 38621906105 + 38621906106.

It is an arithmetic number, because the mean of its divisors is an integer number (38621906106).

Almost surely, 2^77243812211 is an apocalyptic number.

77243812211 is a deficient number, since it is larger than the sum of its proper divisors (1).

77243812211 is an equidigital number, since it uses as much as digits as its factorization.

77243812211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The spelling of 77243812211 in words is "seventy-seven billion, two hundred forty-three million, eight hundred twelve thousand, two hundred eleven".