81582334708 has 24 divisors (see below), whose sum is σ = 163602129152. Its totient is φ = 34870116384.

The previous prime is 81582334693. The next prime is 81582334747. The reversal of 81582334708 is 80743328518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3895260 + ... + 3916147.

Almost surely, 2^81582334708 is an apocalyptic number.

It is an amenable number.

81582334708 is an abundant number, since it is smaller than the sum of its proper divisors (82019794444).

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

81582334708 is a wasteful number, since it uses less digits than its factorization.

81582334708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7811791 (or 7811789 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 81582334708 in words is "eighty-one billion, five hundred eighty-two million, three hundred thirty-four thousand, seven hundred eight".