81071241708 has 24 divisors (see below), whose sum is σ = 197390850048. Its totient is φ = 25848801616.

The previous prime is 81071241697. The next prime is 81071241749. The reversal of 81071241708 is 80714217018.

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, 146867916 + ... + 146868467.

It is an arithmetic number, because the mean of its divisors is an integer number (8224618752).

Almost surely, 2^81071241708 is an apocalyptic number.

It is an amenable number.

81071241708 is an abundant number, since it is smaller than the sum of its proper divisors (116319608340).

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

81071241708 is a wasteful number, since it uses less digits than its factorization.

81071241708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293736413 (or 293736411 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 39.

The spelling of 81071241708 in words is "eighty-one billion, seventy-one million, two hundred forty-one thousand, seven hundred eight".