243077770811 has 2 divisors, whose sum is σ = 243077770812. Its totient is φ = 243077770810.

The previous prime is 243077770787. The next prime is 243077770861. The reversal of 243077770811 is 118077770342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243077770811 is a prime.

It is not a weakly prime, because it can be changed into another prime (243077770861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121538885405 + 121538885406.

It is an arithmetic number, because the mean of its divisors is an integer number (121538885406).

Almost surely, 2^243077770811 is an apocalyptic number.

243077770811 is a deficient number, since it is larger than the sum of its proper divisors (1).

243077770811 is an equidigital number, since it uses as much as digits as its factorization.

243077770811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 243077770811 in words is "two hundred forty-three billion, seventy-seven million, seven hundred seventy thousand, eight hundred eleven".