13881774783 has 4 divisors (see below), whose sum is σ = 18509033048. Its totient is φ = 9254516520.

The previous prime is 13881774769. The next prime is 13881774799. The reversal of 13881774783 is 38747718831.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13881774783 - 2³² = 9586807487 is a prime.

It is a super-2 number, since 2×13881774783² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13881774743) 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, 2313629128 + ... + 2313629133.

It is an arithmetic number, because the mean of its divisors is an integer number (4627258262).

Almost surely, 2^13881774783 is an apocalyptic number.

13881774783 is a deficient number, since it is larger than the sum of its proper divisors (4627258265).

13881774783 is an equidigital number, since it uses as much as digits as its factorization.

13881774783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4627258264.

The product of its digits is 6322176, while the sum is 57.

The spelling of 13881774783 in words is "thirteen billion, eight hundred eighty-one million, seven hundred seventy-four thousand, seven hundred eighty-three".