228624420668789 has 2 divisors, whose sum is σ = 228624420668790. Its totient is φ = 228624420668788.

The previous prime is 228624420668753. The next prime is 228624420668879. The reversal of 228624420668789 is 987866024426822.

It is a happy number.

Together with next prime (228624420668879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214014955562500 + 14609465106289 = 14629250^2 + 3822233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228624420668789 is a prime.

It is a super-2 number, since 2×228624420668789² (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 (228624420668489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114312210334394 + 114312210334395.

It is an arithmetic number, because the mean of its divisors is an integer number (114312210334395).

Almost surely, 2^{228624420668789} is an apocalyptic number.

It is an amenable number.

228624420668789 is a deficient number, since it is larger than the sum of its proper divisors (1).

228624420668789 is an equidigital number, since it uses as much as digits as its factorization.

228624420668789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1783627776, while the sum is 74.

The spelling of 228624420668789 in words is "two hundred twenty-eight trillion, six hundred twenty-four billion, four hundred twenty million, six hundred sixty-eight thousand, seven hundred eighty-nine".