81203595584 has 56 divisors (see below), whose sum is σ = 162263449920. Its totient is φ = 40318746624.

The previous prime is 81203595563. The next prime is 81203595587. The reversal of 81203595584 is 48559530218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81203595587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16260992 + ... + 16265984.

Almost surely, 2^81203595584 is an apocalyptic number.

It is an amenable number.

81203595584 is a deficient number, since it is larger than the sum of its proper divisors (81059854336).

81203595584 is a wasteful number, since it uses less digits than its factorization.

81203595584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727 (or 6717 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 81203595584 in words is "eighty-one billion, two hundred three million, five hundred ninety-five thousand, five hundred eighty-four".