13866401813 has 4 divisors (see below), whose sum is σ = 15126983808. Its totient is φ = 12605819820.

The previous prime is 13866401771. The next prime is 13866401827. The reversal of 13866401813 is 31810466831.

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 not a de Polignac number, because 13866401813 - 2¹⁰ = 13866400789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13866401863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630290981 + ... + 630291002.

It is an arithmetic number, because the mean of its divisors is an integer number (3781745952).

Almost surely, 2^13866401813 is an apocalyptic number.

It is an amenable number.

13866401813 is a deficient number, since it is larger than the sum of its proper divisors (1260581995).

13866401813 is a wasteful number, since it uses less digits than its factorization.

13866401813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260581994.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 13866401813 in words is "thirteen billion, eight hundred sixty-six million, four hundred one thousand, eight hundred thirteen".