81733933832 has 16 divisors (see below), whose sum is σ = 153273988140. Its totient is φ = 40860870336.

The previous prime is 81733933807. The next prime is 81733933861. The reversal of 81733933832 is 23833933718.

It can be written as a sum of positive squares in 2 ways, for example, as 78930654916 + 2803278916 = 280946^2 + 52946^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 704843 + ... + 812570.

Almost surely, 2^81733933832 is an apocalyptic number.

It is an amenable number.

81733933832 is a deficient number, since it is larger than the sum of its proper divisors (71540054308).

81733933832 is a wasteful number, since it uses less digits than its factorization.

81733933832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524152 (or 1524148 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 50.

The spelling of 81733933832 in words is "eighty-one billion, seven hundred thirty-three million, nine hundred thirty-three thousand, eight hundred thirty-two".