81689696096 has 12 divisors (see below), whose sum is σ = 160826589252. Its totient is φ = 40844848032.

The previous prime is 81689696093. The next prime is 81689696107. The reversal of 81689696096 is 69069698618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81689696093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276401470 + ... + 1276401533.

It is an arithmetic number, because the mean of its divisors is an integer number (13402215771).

Almost surely, 2^81689696096 is an apocalyptic number.

It is an amenable number.

81689696096 is a deficient number, since it is larger than the sum of its proper divisors (79136893156).

81689696096 is a wasteful number, since it uses less digits than its factorization.

81689696096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552803013 (or 2552803005 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 68.

The spelling of 81689696096 in words is "eighty-one billion, six hundred eighty-nine million, six hundred ninety-six thousand, ninety-six".