81038771047743 has 32 divisors (see below), whose sum is σ = 113794483200000. Its totient is φ = 51157252454112.

The previous prime is 81038771047733. The next prime is 81038771047771. The reversal of 81038771047743 is 34774017783018.

It is a happy number.

It is not a de Polignac number, because 81038771047743 - 2⁴ = 81038771047727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81038771047733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 995044818 + ... + 995126256.

It is an arithmetic number, because the mean of its divisors is an integer number (3556077600000).

Almost surely, 2^{81038771047743} is an apocalyptic number.

81038771047743 is a deficient number, since it is larger than the sum of its proper divisors (32755712152257).

81038771047743 is a wasteful number, since it uses less digits than its factorization.

81038771047743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89819.

The product of its (nonzero) digits is 22127616, while the sum is 60.

The spelling of 81038771047743 in words is "eighty-one trillion, thirty-eight billion, seven hundred seventy-one million, forty-seven thousand, seven hundred forty-three".