13853811953 has 4 divisors (see below), whose sum is σ = 13867224228. Its totient is φ = 13840399680.

The previous prime is 13853811947. The next prime is 13853811997. The reversal of 13853811953 is 35911835831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35911835831 = 101 ⋅355562731.

It can be written as a sum of positive squares in 2 ways, for example, as 5694664369 + 8159147584 = 75463^2 + 90328^2 .

It is a cyclic number.

It is not a de Polignac number, because 13853811953 - 2¹² = 13853807857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13853811898 and 13853811907.

It is not an unprimeable number, because it can be changed into a prime (13853811253) 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, 6704588 + ... + 6706653.

It is an arithmetic number, because the mean of its divisors is an integer number (3466806057).

Almost surely, 2^13853811953 is an apocalyptic number.

It is an amenable number.

13853811953 is a deficient number, since it is larger than the sum of its proper divisors (13412275).

13853811953 is a wasteful number, since it uses less digits than its factorization.

13853811953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13412274.

The product of its digits is 388800, while the sum is 47.

The spelling of 13853811953 in words is "thirteen billion, eight hundred fifty-three million, eight hundred eleven thousand, nine hundred fifty-three".