81973303324 has 24 divisors (see below), whose sum is σ = 156543344496. Its totient is φ = 37248960000.

The previous prime is 81973303273. The next prime is 81973303361. The reversal of 81973303324 is 42330337918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147477 + ... + 430924.

It is an arithmetic number, because the mean of its divisors is an integer number (6522639354).

Almost surely, 2^81973303324 is an apocalyptic number.

It is an amenable number.

81973303324 is a deficient number, since it is larger than the sum of its proper divisors (74570041172).

81973303324 is a wasteful number, since it uses less digits than its factorization.

81973303324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581637 (or 581635 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 81973303324 in words is "eighty-one billion, nine hundred seventy-three million, three hundred three thousand, three hundred twenty-four".