1438911189639 has 24 divisors (see below), whose sum is σ = 2591285953152. Its totient is φ = 747486331920.

The previous prime is 1438911189563. The next prime is 1438911189731. The reversal of 1438911189639 is 9369811198341.

1438911189639 is a `hidden beast` number, since 1 + 4 + 389 + 11 + 189 + 63 + 9 = 666.

It is not a de Polignac number, because 1438911189639 - 2¹¹ = 1438911187591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438911189239) 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 23 ways as a sum of consecutive naturals, for example, 1038174769 + ... + 1038176154.

It is an arithmetic number, because the mean of its divisors is an integer number (107970248048).

Almost surely, 2^{1438911189639} is an apocalyptic number.

1438911189639 is a deficient number, since it is larger than the sum of its proper divisors (1152374763513).

1438911189639 is a wasteful number, since it uses less digits than its factorization.

1438911189639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076350947 (or 2076350944 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 1438911189639 in words is "one trillion, four hundred thirty-eight billion, nine hundred eleven million, one hundred eighty-nine thousand, six hundred thirty-nine".