9640845819 has 48 divisors (see below), whose sum is σ = 15400779264. Its totient is φ = 5762952000.

The previous prime is 9640845793. The next prime is 9640845829. The reversal of 9640845819 is 9185480469.

It is not a de Polignac number, because 9640845819 - 2⁹ = 9640845307 is a prime.

It is a super-2 number, since 2×9640845819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9640845829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2828014 + ... + 2831420.

It is an arithmetic number, because the mean of its divisors is an integer number (320849568).

Almost surely, 2^9640845819 is an apocalyptic number.

9640845819 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9640845819 is a deficient number, since it is larger than the sum of its proper divisors (5759933445).

9640845819 is a wasteful number, since it uses less digits than its factorization.

9640845819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808 (or 3805 counting only the distinct ones).

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

The square root of 9640845819 is about 98187.8089123085. The cubic root of 9640845819 is about 2128.3271206554.

The spelling of 9640845819 in words is "nine billion, six hundred forty million, eight hundred forty-five thousand, eight hundred nineteen".