13871738881 has 16 divisors (see below), whose sum is σ = 18624993408. Its totient is φ = 9977673600.

The previous prime is 13871738869. The next prime is 13871738887. The reversal of 13871738881 is 18883717831.

It is a cyclic number.

It is not a de Polignac number, because 13871738881 - 2²¹ = 13869641729 is a prime.

It is a super-2 number, since 2×13871738881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13871738887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6927940 + ... + 6929941.

It is an arithmetic number, because the mean of its divisors is an integer number (1164062088).

Almost surely, 2^13871738881 is an apocalyptic number.

13871738881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13871738881 is a deficient number, since it is larger than the sum of its proper divisors (4753254527).

13871738881 is a wasteful number, since it uses less digits than its factorization.

13871738881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13857912.

The product of its digits is 1806336, while the sum is 55.

The spelling of 13871738881 in words is "thirteen billion, eight hundred seventy-one million, seven hundred thirty-eight thousand, eight hundred eighty-one".