242102785609 has 2 divisors, whose sum is σ = 242102785610. Its totient is φ = 242102785608.

The previous prime is 242102785607. The next prime is 242102785643. The reversal of 242102785609 is 906587201242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166366094400 + 75736691209 = 407880^2 + 275203^2 .

It is a cyclic number.

It is not a de Polignac number, because 242102785609 - 2¹ = 242102785607 is a prime.

It is a super-2 number, since 2×242102785609² (a number of 24 digits) contains 22 as substring.

Together with 242102785607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242102785607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121051392804 + 121051392805.

It is an arithmetic number, because the mean of its divisors is an integer number (121051392805).

Almost surely, 2^242102785609 is an apocalyptic number.

It is an amenable number.

242102785609 is a deficient number, since it is larger than the sum of its proper divisors (1).

242102785609 is an equidigital number, since it uses as much as digits as its factorization.

242102785609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 242102785609 in words is "two hundred forty-two billion, one hundred two million, seven hundred eighty-five thousand, six hundred nine".