13853811956 has 6 divisors (see below), whose sum is σ = 24244170930. Its totient is φ = 6926905976.

The previous prime is 13853811947. The next prime is 13853811997. The reversal of 13853811956 is 65911835831.

It can be written as a sum of positive squares in only one way, i.e., 8909472100 + 4944339856 = 94390^2 + 70316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1731726491 + ... + 1731726498.

It is an arithmetic number, because the mean of its divisors is an integer number (4040695155).

Almost surely, 2^13853811956 is an apocalyptic number.

It is an amenable number.

13853811956 is a deficient number, since it is larger than the sum of its proper divisors (10390358974).

13853811956 is a wasteful number, since it uses less digits than its factorization.

13853811956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463452993 (or 3463452991 counting only the distinct ones).

The product of its digits is 777600, while the sum is 50.

The spelling of 13853811956 in words is "thirteen billion, eight hundred fifty-three million, eight hundred eleven thousand, nine hundred fifty-six".