9819608409 has 24 divisors (see below), whose sum is σ = 15308164872. Its totient is φ = 6029694720.

The previous prime is 9819608389. The next prime is 9819608417. The reversal of 9819608409 is 9048069189.

It can be written as a sum of positive squares in 4 ways, for example, as 4347225 + 9815261184 = 2085^2 + 99072^2 .

It is not a de Polignac number, because 9819608409 - 2¹⁵ = 9819575641 is a prime.

It is a super-2 number, since 2×9819608409² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9819608209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37092 + ... + 144965.

It is an arithmetic number, because the mean of its divisors is an integer number (637840203).

Almost surely, 2^9819608409 is an apocalyptic number.

It is an amenable number.

9819608409 is a deficient number, since it is larger than the sum of its proper divisors (5488556463).

9819608409 is a wasteful number, since it uses less digits than its factorization.

9819608409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182537 (or 182534 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 9819608409 is about 99093.9372968902. The cubic root of 9819608409 is about 2141.4012723212.

The spelling of 9819608409 in words is "nine billion, eight hundred nineteen million, six hundred eight thousand, four hundred nine".