81329606303 has 8 divisors (see below), whose sum is σ = 88744227456. Its totient is φ = 73918488600.

The previous prime is 81329606243. The next prime is 81329606333. The reversal of 81329606303 is 30360692318.

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

It is a de Polignac number, because none of the positive numbers 2^k-81329606303 is a prime.

It is a super-2 number, since 2×81329606303² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81329606333) 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, 827201 + ... + 920282.

It is an arithmetic number, because the mean of its divisors is an integer number (11093028432).

Almost surely, 2^81329606303 is an apocalyptic number.

81329606303 is a deficient number, since it is larger than the sum of its proper divisors (7414621153).

81329606303 is a wasteful number, since it uses less digits than its factorization.

81329606303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751725.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 81329606303 in words is "eighty-one billion, three hundred twenty-nine million, six hundred six thousand, three hundred three".