13855313138478 has 256 divisors, whose sum is σ = 32957864755200. Its totient is φ = 3881006825472.

The previous prime is 13855313138473. The next prime is 13855313138539. The reversal of 13855313138478 is 87483131355831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13855313138473) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8841934851 + ... + 8841936417.

It is an arithmetic number, because the mean of its divisors is an integer number (128741659200).

Almost surely, 2^{13855313138478} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13855313138478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16478932377600).

13855313138478 is an abundant number, since it is smaller than the sum of its proper divisors (19102551616722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13855313138478 is a wasteful number, since it uses less digits than its factorization.

13855313138478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2082 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 60.

The spelling of 13855313138478 in words is "thirteen trillion, eight hundred fifty-five billion, three hundred thirteen million, one hundred thirty-eight thousand, four hundred seventy-eight".