9998779288684 has 12 divisors (see below), whose sum is σ = 17500000043008. Its totient is φ = 4998779276400.

The previous prime is 9998779288661. The next prime is 9998779288697. The reversal of 9998779288684 is 4868829778999.

It is a super-2 number, since 2×9998779288684² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9998779288592 and 9998779288601.

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, 152555127 + ... + 152620654.

Almost surely, 2^{9998779288684} is an apocalyptic number.

It is an amenable number.

9998779288684 is a deficient number, since it is larger than the sum of its proper divisors (7501220754324).

9998779288684 is a wasteful number, since it uses less digits than its factorization.

9998779288684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305183976 (or 305183974 counting only the distinct ones).

The product of its digits is 63207309312, while the sum is 94.

The spelling of 9998779288684 in words is "nine trillion, nine hundred ninety-eight billion, seven hundred seventy-nine million, two hundred eighty-eight thousand, six hundred eighty-four".