242776730672461 has 2 divisors, whose sum is σ = 242776730672462. Its totient is φ = 242776730672460.

The previous prime is 242776730672459. The next prime is 242776730672573. The reversal of 242776730672461 is 164276037677242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242614704296836 + 162026375625 = 15576094^2 + 402525^2 .

It is a cyclic number.

It is not a de Polignac number, because 242776730672461 - 2¹ = 242776730672459 is a prime.

Together with 242776730672459, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 242776730672393 and 242776730672402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242776730672401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121388365336230 + 121388365336231.

It is an arithmetic number, because the mean of its divisors is an integer number (121388365336231).

Almost surely, 2^{242776730672461} is an apocalyptic number.

It is an amenable number.

242776730672461 is a deficient number, since it is larger than the sum of its proper divisors (1).

242776730672461 is an equidigital number, since it uses as much as digits as its factorization.

242776730672461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 199148544, while the sum is 64.

The spelling of 242776730672461 in words is "two hundred forty-two trillion, seven hundred seventy-six billion, seven hundred thirty million, six hundred seventy-two thousand, four hundred sixty-one".