9970843816 has 32 divisors (see below), whose sum is σ = 19038770280. Its totient is φ = 4894156800.

The previous prime is 9970843789. The next prime is 9970843819. The reversal of 9970843816 is 6183480799.

It can be written as a sum of positive squares in 4 ways, for example, as 2845795716 + 7125048100 = 53346^2 + 84410^2 .

It is not an unprimeable number, because it can be changed into a prime (9970843819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234640 + ... + 273856.

Almost surely, 2^9970843816 is an apocalyptic number.

It is an amenable number.

9970843816 is a deficient number, since it is larger than the sum of its proper divisors (9067926464).

9970843816 is a wasteful number, since it uses less digits than its factorization.

9970843816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39805 (or 39801 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 9970843816 is about 99854.1126644266. The cubic root of 9970843816 is about 2152.3388153120.

The spelling of 9970843816 in words is "nine billion, nine hundred seventy million, eight hundred forty-three thousand, eight hundred sixteen".