226404643987 has 2 divisors, whose sum is σ = 226404643988. Its totient is φ = 226404643986.

The previous prime is 226404643957. The next prime is 226404644009. The reversal of 226404643987 is 789346404622.

It is a happy number.

226404643987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226404643987 is a prime.

It is not a weakly prime, because it can be changed into another prime (226404643957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113202321993 + 113202321994.

It is an arithmetic number, because the mean of its divisors is an integer number (113202321994).

Almost surely, 2^226404643987 is an apocalyptic number.

226404643987 is a deficient number, since it is larger than the sum of its proper divisors (1).

226404643987 is an equidigital number, since it uses as much as digits as its factorization.

226404643987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 226404643987 in words is "two hundred twenty-six billion, four hundred four million, six hundred forty-three thousand, nine hundred eighty-seven".