81141328633 has 8 divisors (see below), whose sum is σ = 81636022656. Its totient is φ = 80646930000.

The previous prime is 81141328601. The next prime is 81141328657. The reversal of 81141328633 is 33682314118.

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

It is a cyclic number.

It is not a de Polignac number, because 81141328633 - 2⁵ = 81141328601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81141328673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490288 + ... + 634558.

It is an arithmetic number, because the mean of its divisors is an integer number (10204502832).

Almost surely, 2^81141328633 is an apocalyptic number.

It is an amenable number.

81141328633 is a deficient number, since it is larger than the sum of its proper divisors (494694023).

81141328633 is a wasteful number, since it uses less digits than its factorization.

81141328633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147695.

The product of its digits is 82944, while the sum is 40.

The spelling of 81141328633 in words is "eighty-one billion, one hundred forty-one million, three hundred twenty-eight thousand, six hundred thirty-three".