438505627447 has 2 divisors, whose sum is σ = 438505627448. Its totient is φ = 438505627446.

The previous prime is 438505627421. The next prime is 438505627457. The reversal of 438505627447 is 744726505834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438505627447 - 2¹⁵ = 438505594679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438505627457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219252813723 + 219252813724.

It is an arithmetic number, because the mean of its divisors is an integer number (219252813724).

Almost surely, 2^438505627447 is an apocalyptic number.

438505627447 is a deficient number, since it is larger than the sum of its proper divisors (1).

438505627447 is an equidigital number, since it uses as much as digits as its factorization.

438505627447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22579200, while the sum is 55.

The spelling of 438505627447 in words is "four hundred thirty-eight billion, five hundred five million, six hundred twenty-seven thousand, four hundred forty-seven".