13879781971 has 16 divisors (see below), whose sum is σ = 16042946400. Its totient is φ = 11867834880.

The previous prime is 13879781957. The next prime is 13879782011. The reversal of 13879781971 is 17918797831.

It is not a de Polignac number, because 13879781971 - 2⁵ = 13879781939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13879781921) 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, 265705 + ... + 313621.

It is an arithmetic number, because the mean of its divisors is an integer number (1002684150).

Almost surely, 2^13879781971 is an apocalyptic number.

13879781971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13879781971 is a deficient number, since it is larger than the sum of its proper divisors (2163164429).

13879781971 is a wasteful number, since it uses less digits than its factorization.

13879781971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49494.

The product of its digits is 5334336, while the sum is 61.

The spelling of 13879781971 in words is "thirteen billion, eight hundred seventy-nine million, seven hundred eighty-one thousand, nine hundred seventy-one".