1438143815863 has 8 divisors (see below), whose sum is σ = 1440390917088. Its totient is φ = 1435897042944.

The previous prime is 1438143815851. The next prime is 1438143815909. The reversal of 1438143815863 is 3685183418341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438143815863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438143810863) 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 7 ways as a sum of consecutive naturals, for example, 9567495 + ... + 9716647.

It is an arithmetic number, because the mean of its divisors is an integer number (180048864636).

Almost surely, 2^{1438143815863} is an apocalyptic number.

1438143815863 is a deficient number, since it is larger than the sum of its proper divisors (2247101225).

1438143815863 is a wasteful number, since it uses less digits than its factorization.

1438143815863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164153.

The product of its digits is 6635520, while the sum is 55.

The spelling of 1438143815863 in words is "one trillion, four hundred thirty-eight billion, one hundred forty-three million, eight hundred fifteen thousand, eight hundred sixty-three".