42777242243 has 2 divisors, whose sum is σ = 42777242244. Its totient is φ = 42777242242.

The previous prime is 42777242237. The next prime is 42777242267. The reversal of 42777242243 is 34224277724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42777242243 - 2²⁰ = 42776193667 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42777242194 and 42777242203.

It is not a weakly prime, because it can be changed into another prime (42777242743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21388621121 + 21388621122.

It is an arithmetic number, because the mean of its divisors is an integer number (21388621122).

Almost surely, 2^42777242243 is an apocalyptic number.

42777242243 is a deficient number, since it is larger than the sum of its proper divisors (1).

42777242243 is an equidigital number, since it uses as much as digits as its factorization.

42777242243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1053696, while the sum is 44.

The spelling of 42777242243 in words is "forty-two billion, seven hundred seventy-seven million, two hundred forty-two thousand, two hundred forty-three".