81344752584 has 16 divisors (see below), whose sum is σ = 203361881520. Its totient is φ = 27114917520.

The previous prime is 81344752553. The next prime is 81344752597. The reversal of 81344752584 is 48525744318.

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, 1694682322 + ... + 1694682369.

It is an arithmetic number, because the mean of its divisors is an integer number (12710117595).

Almost surely, 2^81344752584 is an apocalyptic number.

It is an amenable number.

81344752584 is an abundant number, since it is smaller than the sum of its proper divisors (122017128936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81344752584 is a wasteful number, since it uses less digits than its factorization.

81344752584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389364700 (or 3389364696 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 51.

The spelling of 81344752584 in words is "eighty-one billion, three hundred forty-four million, seven hundred fifty-two thousand, five hundred eighty-four".