81694934596 has 24 divisors (see below), whose sum is σ = 165137355936. Its totient is φ = 34949704320.

The previous prime is 81694934569. The next prime is 81694934597. The reversal of 81694934596 is 69543949618.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81694934597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54608166 + ... + 54609661.

It is an arithmetic number, because the mean of its divisors is an integer number (6880723164).

Almost surely, 2^81694934596 is an apocalyptic number.

It is an amenable number.

81694934596 is an abundant number, since it is smaller than the sum of its proper divisors (83442421340).

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

81694934596 is a wasteful number, since it uses less digits than its factorization.

81694934596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109217859 (or 109217857 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 64.

The spelling of 81694934596 in words is "eighty-one billion, six hundred ninety-four million, nine hundred thirty-four thousand, five hundred ninety-six".