83809108656 has 480 divisors, whose sum is σ = 316221010560. Its totient is φ = 20084391936.

The previous prime is 83809108609. The next prime is 83809108679. The reversal of 83809108656 is 65680190838.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6453786 + ... + 6466758.

It is an arithmetic number, because the mean of its divisors is an integer number (658793772).

Almost surely, 2^83809108656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83809108656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158110505280).

83809108656 is an abundant number, since it is smaller than the sum of its proper divisors (232411901904).

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

83809108656 is a wasteful number, since it uses less digits than its factorization.

83809108656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13053 (or 13044 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 83809108656 in words is "eighty-three billion, eight hundred nine million, one hundred eight thousand, six hundred fifty-six".