81163742063041 has 32 divisors (see below), whose sum is σ = 94586297287680. Its totient is φ = 68902500004800.

The previous prime is 81163742063029. The next prime is 81163742063069. The reversal of 81163742063041 is 14036024736118.

It is not a de Polignac number, because 81163742063041 - 2¹⁹ = 81163741538753 is a prime.

It is a super-3 number, since 3×81163742063041³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81163742062982 and 81163742063000.

It is not an unprimeable number, because it can be changed into a prime (81163742060041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20705706 + ... + 24311596.

It is an arithmetic number, because the mean of its divisors is an integer number (2955821790240).

Almost surely, 2^{81163742063041} is an apocalyptic number.

It is an amenable number.

81163742063041 is a deficient number, since it is larger than the sum of its proper divisors (13422555224639).

81163742063041 is a wasteful number, since it uses less digits than its factorization.

81163742063041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608037.

The product of its (nonzero) digits is 580608, while the sum is 46.

Adding to 81163742063041 its reverse (14036024736118), we get a palindrome (95199766799159).

The spelling of 81163742063041 in words is "eighty-one trillion, one hundred sixty-three billion, seven hundred forty-two million, sixty-three thousand, forty-one".