9808205856 has 24 divisors (see below), whose sum is σ = 25746540624. Its totient is φ = 3269401920.

The previous prime is 9808205839. The next prime is 9808205861. The reversal of 9808205856 is 6585028089.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×9808205856² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9808205799 and 9808205808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51084310 + ... + 51084501.

It is an arithmetic number, because the mean of its divisors is an integer number (1072772526).

Almost surely, 2^9808205856 is an apocalyptic number.

9808205856 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9808205856 is an abundant number, since it is smaller than the sum of its proper divisors (15938334768).

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

9808205856 is a wasteful number, since it uses less digits than its factorization.

9808205856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102168824 (or 102168816 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 51.

The square root of 9808205856 is about 99036.3865253574. The cubic root of 9808205856 is about 2140.5720845103.

The spelling of 9808205856 in words is "nine billion, eight hundred eight million, two hundred five thousand, eight hundred fifty-six".