813800013812 has 12 divisors (see below), whose sum is σ = 1425910413060. Its totient is φ = 406397038656.

The previous prime is 813800013797. The next prime is 813800013827. The reversal of 813800013812 is 218310008318.

It is an interprime number because it is at equal distance from previous prime (813800013797) and next prime (813800013827).

It can be written as a sum of positive squares in 2 ways, for example, as 759330988816 + 54469024996 = 871396^2 + 233386^2 .

It is a super-2 number, since 2×813800013812² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125738423 + ... + 125744894.

It is an arithmetic number, because the mean of its divisors is an integer number (118825867755).

Almost surely, 2^813800013812 is an apocalyptic number.

It is an amenable number.

813800013812 is a deficient number, since it is larger than the sum of its proper divisors (612110399248).

813800013812 is a wasteful number, since it uses less digits than its factorization.

813800013812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251484130 (or 251484128 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 813800013812 in words is "eight hundred thirteen billion, eight hundred million, thirteen thousand, eight hundred twelve".