81004943150159 has 32 divisors (see below), whose sum is σ = 95601254031360. Its totient is φ = 67196317299552.

The previous prime is 81004943150123. The next prime is 81004943150167. The reversal of 81004943150159 is 95105134940018.

It is a happy number.

It is not a de Polignac number, because 81004943150159 - 2¹² = 81004943146063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81004943150119) 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, 19120454 + ... + 22969580.

It is an arithmetic number, because the mean of its divisors is an integer number (2987539188480).

Almost surely, 2^{81004943150159} is an apocalyptic number.

81004943150159 is a deficient number, since it is larger than the sum of its proper divisors (14596310881201).

81004943150159 is a wasteful number, since it uses less digits than its factorization.

81004943150159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849819.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 81004943150159 in words is "eighty-one trillion, four billion, nine hundred forty-three million, one hundred fifty thousand, one hundred fifty-nine".