81552984573 has 16 divisors (see below), whose sum is σ = 109247201280. Its totient is φ = 54113812464.

The previous prime is 81552984563. The next prime is 81552984581. The reversal of 81552984573 is 37548925518.

It is not a de Polignac number, because 81552984573 - 2¹⁰ = 81552983549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81552984533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4485940 + ... + 4504082.

It is an arithmetic number, because the mean of its divisors is an integer number (6827950080).

Almost surely, 2^81552984573 is an apocalyptic number.

It is an amenable number.

81552984573 is a deficient number, since it is larger than the sum of its proper divisors (27694216707).

81552984573 is a wasteful number, since it uses less digits than its factorization.

81552984573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25088.

The product of its digits is 12096000, while the sum is 57.

The spelling of 81552984573 in words is "eighty-one billion, five hundred fifty-two million, nine hundred eighty-four thousand, five hundred seventy-three".