81735560330 has 32 divisors (see below), whose sum is σ = 149194911744. Its totient is φ = 32234357376.

The previous prime is 81735560323. The next prime is 81735560339. The reversal of 81735560330 is 3306553718.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81735560339) 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 15 ways as a sum of consecutive naturals, for example, 2088119 + ... + 2126901.

It is an arithmetic number, because the mean of its divisors is an integer number (4662340992).

Almost surely, 2^81735560330 is an apocalyptic number.

81735560330 is a deficient number, since it is larger than the sum of its proper divisors (67459351414).

81735560330 is a wasteful number, since it uses less digits than its factorization.

81735560330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41750.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 81735560330 in words is "eighty-one billion, seven hundred thirty-five million, five hundred sixty thousand, three hundred thirty".