1338437318281 has 16 divisors (see below), whose sum is σ = 1570569977088. Its totient is φ = 1116665740800.

The previous prime is 1338437318221. The next prime is 1338437318311. The reversal of 1338437318281 is 1828137348331.

It is a cyclic number.

It is not a de Polignac number, because 1338437318281 - 2⁹ = 1338437317769 is a prime.

It is a super-2 number, since 2×1338437318281² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1338437318221) 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, 5260885 + ... + 5509426.

It is an arithmetic number, because the mean of its divisors is an integer number (98160623568).

Almost surely, 2^{1338437318281} is an apocalyptic number.

It is an amenable number.

1338437318281 is a deficient number, since it is larger than the sum of its proper divisors (232132658807).

1338437318281 is a wasteful number, since it uses less digits than its factorization.

1338437318281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10770792.

The product of its digits is 2322432, while the sum is 52.

The spelling of 1338437318281 in words is "one trillion, three hundred thirty-eight billion, four hundred thirty-seven million, three hundred eighteen thousand, two hundred eighty-one".