9870634856 has 16 divisors (see below), whose sum is σ = 19104455040. Its totient is φ = 4776113520.

The previous prime is 9870634849. The next prime is 9870634859. The reversal of 9870634856 is 6584360789.

It is not an unprimeable number, because it can be changed into a prime (9870634859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19900226 + ... + 19900721.

It is an arithmetic number, because the mean of its divisors is an integer number (1194028440).

Almost surely, 2^9870634856 is an apocalyptic number.

It is an amenable number.

9870634856 is a deficient number, since it is larger than the sum of its proper divisors (9233820184).

9870634856 is a wasteful number, since it uses less digits than its factorization.

9870634856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39800984 (or 39800980 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The square root of 9870634856 is about 99351.0687209755. The cubic root of 9870634856 is about 2145.1040464777.

The spelling of 9870634856 in words is "nine billion, eight hundred seventy million, six hundred thirty-four thousand, eight hundred fifty-six".