81000063000013 has 8 divisors (see below), whose sum is σ = 85362482928800. Its totient is φ = 76647568943088.

The previous prime is 81000062999969. The next prime is 81000063000053. The reversal of 81000063000013 is 31000036000018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81000063000013 - 2⁹ = 81000062999501 is a prime.

It is a super-2 number, since 2×81000063000013² (a number of 29 digits) contains 22 as substring.

It is the 9000004-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81000063000053) by changing a digit.

It is a nontrivial repunit in base 9000003.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2481451206 + ... + 2481483847.

It is an arithmetic number, because the mean of its divisors is an integer number (10670310366100).

Almost surely, 2^{81000063000013} is an apocalyptic number.

It is an amenable number.

81000063000013 is a deficient number, since it is larger than the sum of its proper divisors (4362419928787).

81000063000013 is a wasteful number, since it uses less digits than its factorization.

81000063000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962935931.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 81000063000013 in words is "eighty-one trillion, sixty-three million, thirteen", and thus it is an aban number and an uban number.