242635646437 has 2 divisors, whose sum is σ = 242635646438. Its totient is φ = 242635646436.

The previous prime is 242635646387. The next prime is 242635646471. The reversal of 242635646437 is 734646536242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128084536321 + 114551110116 = 357889^2 + 338454^2 .

It is a cyclic number.

It is not a de Polignac number, because 242635646437 - 2³⁵ = 208275908069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242635646497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121317823218 + 121317823219.

It is an arithmetic number, because the mean of its divisors is an integer number (121317823219).

Almost surely, 2^242635646437 is an apocalyptic number.

It is an amenable number.

242635646437 is a deficient number, since it is larger than the sum of its proper divisors (1).

242635646437 is an equidigital number, since it uses as much as digits as its factorization.

242635646437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 52.

The spelling of 242635646437 in words is "two hundred forty-two billion, six hundred thirty-five million, six hundred forty-six thousand, four hundred thirty-seven".