13881377394 has 96 divisors (see below), whose sum is σ = 32070954240. Its totient is φ = 4330972800.

The previous prime is 13881377327. The next prime is 13881377407. The reversal of 13881377394 is 49377318831.

It is a self number, because there is not a number n which added to its sum of digits gives 13881377394.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6005499 + ... + 6007809.

It is an arithmetic number, because the mean of its divisors is an integer number (334072440).

Almost surely, 2^13881377394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13881377394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16035477120).

13881377394 is an abundant number, since it is smaller than the sum of its proper divisors (18189576846).

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

13881377394 is a wasteful number, since it uses less digits than its factorization.

13881377394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2693 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 13881377394 in words is "thirteen billion, eight hundred eighty-one million, three hundred seventy-seven thousand, three hundred ninety-four".