242842944781 has 2 divisors, whose sum is σ = 242842944782. Its totient is φ = 242842944780.

The previous prime is 242842944767. The next prime is 242842944787. The reversal of 242842944781 is 187449248242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202959260100 + 39883684681 = 450510^2 + 199709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242842944781 is a prime.

It is a super-2 number, since 2×242842944781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242842944787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121421472390 + 121421472391.

It is an arithmetic number, because the mean of its divisors is an integer number (121421472391).

Almost surely, 2^242842944781 is an apocalyptic number.

It is an amenable number.

242842944781 is a deficient number, since it is larger than the sum of its proper divisors (1).

242842944781 is an equidigital number, since it uses as much as digits as its factorization.

242842944781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8257536, while the sum is 55.

The spelling of 242842944781 in words is "two hundred forty-two billion, eight hundred forty-two million, nine hundred forty-four thousand, seven hundred eighty-one".