13851968335861 has 4 divisors (see below), whose sum is σ = 13852971606592. Its totient is φ = 13850965065132.

The previous prime is 13851968335831. The next prime is 13851968335871. The reversal of 13851968335861 is 16853386915831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13851968335861 - 2³¹ = 13849820852213 is a prime.

It is a super-2 number, since 2×13851968335861² (a number of 27 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 (13851968335831) 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, 501614655 + ... + 501642268.

It is an arithmetic number, because the mean of its divisors is an integer number (3463242901648).

Almost surely, 2^{13851968335861} is an apocalyptic number.

It is an amenable number.

13851968335861 is a deficient number, since it is larger than the sum of its proper divisors (1003270731).

13851968335861 is a wasteful number, since it uses less digits than its factorization.

13851968335861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003270730.

The product of its digits is 111974400, while the sum is 67.

The spelling of 13851968335861 in words is "thirteen trillion, eight hundred fifty-one billion, nine hundred sixty-eight million, three hundred thirty-five thousand, eight hundred sixty-one".