242267780617 has 2 divisors, whose sum is σ = 242267780618. Its totient is φ = 242267780616.

The previous prime is 242267780611. The next prime is 242267780663. The reversal of 242267780617 is 716087762242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150715544841 + 91552235776 = 388221^2 + 302576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242267780617 is a prime.

It is not a weakly prime, because it can be changed into another prime (242267780611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121133890308 + 121133890309.

It is an arithmetic number, because the mean of its divisors is an integer number (121133890309).

Almost surely, 2^242267780617 is an apocalyptic number.

It is an amenable number.

242267780617 is a deficient number, since it is larger than the sum of its proper divisors (1).

242267780617 is an equidigital number, since it uses as much as digits as its factorization.

242267780617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 242267780617 in words is "two hundred forty-two billion, two hundred sixty-seven million, seven hundred eighty thousand, six hundred seventeen".