9805218816 has 44 divisors (see below), whose sum is σ = 26134491152. Its totient is φ = 3268405248.

The previous prime is 9805218799. The next prime is 9805218823. The reversal of 9805218816 is 6188125089.

It is a super-2 number, since 2×9805218816² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 1592830 + ... + 1598973.

It is an arithmetic number, because the mean of its divisors is an integer number (593965708).

Almost surely, 2^9805218816 is an apocalyptic number.

9805218816 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9805218816 is an abundant number, since it is smaller than the sum of its proper divisors (16329272336).

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

9805218816 is a wasteful number, since it uses less digits than its factorization.

9805218816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191826 (or 3191808 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 48.

The square root of 9805218816 is about 99021.3048591060. The cubic root of 9805218816 is about 2140.3547622760.

The spelling of 9805218816 in words is "nine billion, eight hundred five million, two hundred eighteen thousand, eight hundred sixteen".