81433323041 has 32 divisors (see below), whose sum is σ = 99157893120. Its totient is φ = 65284229376.

The previous prime is 81433323017. The next prime is 81433323053. The reversal of 81433323041 is 14032333418.

It is a cyclic number.

It is not a de Polignac number, because 81433323041 - 2¹⁰ = 81433322017 is a prime.

It is a super-2 number, since 2×81433323041² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81433322989 and 81433323007.

It is not an unprimeable number, because it can be changed into a prime (81433323341) 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, 13736420 + ... + 13742346.

It is an arithmetic number, because the mean of its divisors is an integer number (3098684160).

Almost surely, 2^81433323041 is an apocalyptic number.

It is an amenable number.

81433323041 is a deficient number, since it is larger than the sum of its proper divisors (17724570079).

81433323041 is a wasteful number, since it uses less digits than its factorization.

81433323041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 81433323041 its reverse (14032333418), we get a palindrome (95465656459).

The spelling of 81433323041 in words is "eighty-one billion, four hundred thirty-three million, three hundred twenty-three thousand, forty-one".