1438013501887 has 4 divisors (see below), whose sum is σ = 1500535828080. Its totient is φ = 1375491175696.

The previous prime is 1438013501879. The next prime is 1438013501893. The reversal of 1438013501887 is 7881053108341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1438013501887 - 2³ = 1438013501879 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 1438013501887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438013504887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31261163062 + ... + 31261163107.

It is an arithmetic number, because the mean of its divisors is an integer number (375133957020).

Almost surely, 2^{1438013501887} is an apocalyptic number.

1438013501887 is a deficient number, since it is larger than the sum of its proper divisors (62522326193).

1438013501887 is an equidigital number, since it uses as much as digits as its factorization.

1438013501887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62522326192.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 1438013501887 in words is "one trillion, four hundred thirty-eight billion, thirteen million, five hundred one thousand, eight hundred eighty-seven".