81008033603330 has 16 divisors (see below), whose sum is σ = 145815130861560. Its totient is φ = 32403064468992.

The previous prime is 81008033603309. The next prime is 81008033603383. The reversal of 81008033603330 is 3330633080018.

It can be written as a sum of positive squares in 4 ways, for example, as 47541149110081 + 33466884493249 = 6895009^2 + 5785057^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16324175 + ... + 20700114.

Almost surely, 2^{81008033603330} is an apocalyptic number.

81008033603330 is a deficient number, since it is larger than the sum of its proper divisors (64807097258230).

81008033603330 is a wasteful number, since it uses less digits than its factorization.

81008033603330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37243093.

The product of its (nonzero) digits is 93312, while the sum is 38.

Adding to 81008033603330 its reverse (3330633080018), we get a palindrome (84338666683348).

The spelling of 81008033603330 in words is "eighty-one trillion, eight billion, thirty-three million, six hundred three thousand, three hundred thirty".