242378160810581 has 2 divisors, whose sum is σ = 242378160810582. Its totient is φ = 242378160810580.

The previous prime is 242378160810547. The next prime is 242378160810589. The reversal of 242378160810581 is 185018061873242.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133396378570225 + 108981782240356 = 11549735^2 + 10439434^2 .

It is a cyclic number.

It is not a de Polignac number, because 242378160810581 - 2³⁴ = 242360980941397 is a prime.

It is a super-2 number, since 2×242378160810581² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242378160810589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121189080405290 + 121189080405291.

It is an arithmetic number, because the mean of its divisors is an integer number (121189080405291).

Almost surely, 2^{242378160810581} is an apocalyptic number.

It is an amenable number.

242378160810581 is a deficient number, since it is larger than the sum of its proper divisors (1).

242378160810581 is an equidigital number, since it uses as much as digits as its factorization.

242378160810581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 242378160810581 in words is "two hundred forty-two trillion, three hundred seventy-eight billion, one hundred sixty million, eight hundred ten thousand, five hundred eighty-one".