1311455538238 has 8 divisors (see below), whose sum is σ = 1972138430232. Its totient is φ = 654076061496.

The previous prime is 1311455538233. The next prime is 1311455538241. The reversal of 1311455538238 is 8328355541131.

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

It is a junction number, because it is equal to n+sod(n) for n = 1311455538191 and 1311455538200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311455538233) 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, 825852820 + ... + 825854407.

It is an arithmetic number, because the mean of its divisors is an integer number (246517303779).

Almost surely, 2^{1311455538238} is an apocalyptic number.

1311455538238 is a deficient number, since it is larger than the sum of its proper divisors (660682891994).

1311455538238 is a wasteful number, since it uses less digits than its factorization.

1311455538238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651707626.

The product of its digits is 1728000, while the sum is 49.

The spelling of 1311455538238 in words is "one trillion, three hundred eleven billion, four hundred fifty-five million, five hundred thirty-eight thousand, two hundred thirty-eight".