81300000813 has 16 divisors (see below), whose sum is σ = 115200020736. Its totient is φ = 50823521280.

The previous prime is 81300000811. The next prime is 81300000823. The reversal of 81300000813 is 31800000318.

It is not a de Polignac number, because 81300000813 - 2¹ = 81300000811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81300000811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2927356 + ... + 2954997.

It is an arithmetic number, because the mean of its divisors is an integer number (7200001296).

Almost surely, 2^81300000813 is an apocalyptic number.

It is an amenable number.

81300000813 is a deficient number, since it is larger than the sum of its proper divisors (33900019923).

81300000813 is a wasteful number, since it uses less digits than its factorization.

81300000813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882644.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 81300000813 in words is "eighty-one billion, three hundred million, eight hundred thirteen", and thus it is an aban number.