9778244648 has 16 divisors (see below), whose sum is σ = 18505558080. Its totient is φ = 4843429168.

The previous prime is 9778244629. The next prime is 9778244681. The reversal of 9778244648 is 8464428779.

It is a super-2 number, since 2×9778244648² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5710736 + ... + 5712447.

It is an arithmetic number, because the mean of its divisors is an integer number (1156597380).

Almost surely, 2^9778244648 is an apocalyptic number.

It is an amenable number.

9778244648 is a deficient number, since it is larger than the sum of its proper divisors (8727313432).

9778244648 is a wasteful number, since it uses less digits than its factorization.

9778244648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11423296 (or 11423292 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 59.

The square root of 9778244648 is about 98885.0071952265. The cubic root of 9778244648 is about 2138.3902535979.

The spelling of 9778244648 in words is "nine billion, seven hundred seventy-eight million, two hundred forty-four thousand, six hundred forty-eight".