81000968441 has 8 divisors (see below), whose sum is σ = 81435069600. Its totient is φ = 80567016192.

The previous prime is 81000968429. The next prime is 81000968453. The reversal of 81000968441 is 14486900018.

It is an interprime number because it is at equal distance from previous prime (81000968429) and next prime (81000968453).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81000968441 is a prime.

It is a super-2 number, since 2×81000968441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81000968401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155410 + ... + 1223508.

It is an arithmetic number, because the mean of its divisors is an integer number (10179383700).

Almost surely, 2^81000968441 is an apocalyptic number.

It is an amenable number.

81000968441 is a deficient number, since it is larger than the sum of its proper divisors (434101159).

81000968441 is a wasteful number, since it uses less digits than its factorization.

81000968441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74455.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 81000968441 in words is "eighty-one billion, nine hundred sixty-eight thousand, four hundred forty-one".