438686241569 has 2 divisors, whose sum is σ = 438686241570. Its totient is φ = 438686241568.

The previous prime is 438686241551. The next prime is 438686241601. The reversal of 438686241569 is 965142686834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415380250000 + 23305991569 = 644500^2 + 152663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438686241569 is a prime.

It is a super-4 number, since 4×438686241569⁴ (a number of 48 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (438686241269) 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, 219343120784 + 219343120785.

It is an arithmetic number, because the mean of its divisors is an integer number (219343120785).

Almost surely, 2^438686241569 is an apocalyptic number.

It is an amenable number.

438686241569 is a deficient number, since it is larger than the sum of its proper divisors (1).

438686241569 is an equidigital number, since it uses as much as digits as its factorization.

438686241569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59719680, while the sum is 62.

The spelling of 438686241569 in words is "four hundred thirty-eight billion, six hundred eighty-six million, two hundred forty-one thousand, five hundred sixty-nine".