438380667647 has 16 divisors (see below), whose sum is σ = 473941927200. Its totient is φ = 403085289600.

The previous prime is 438380667643. The next prime is 438380667733. The reversal of 438380667647 is 746766083834.

It is a cyclic number.

It is not a de Polignac number, because 438380667647 - 2² = 438380667643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438380667647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438380667643) 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 in 15 ways as a sum of consecutive naturals, for example, 3389729 + ... + 3516677.

It is an arithmetic number, because the mean of its divisors is an integer number (29621370450).

Almost surely, 2^438380667647 is an apocalyptic number.

438380667647 is a deficient number, since it is larger than the sum of its proper divisors (35561259553).

438380667647 is a wasteful number, since it uses less digits than its factorization.

438380667647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127994.

The product of its (nonzero) digits is 97542144, while the sum is 62.

The spelling of 438380667647 in words is "four hundred thirty-eight billion, three hundred eighty million, six hundred sixty-seven thousand, six hundred forty-seven".