9851980864 has 56 divisors (see below), whose sum is σ = 21349411200. Its totient is φ = 4473530880.

The previous prime is 9851980837. The next prime is 9851980903. The reversal of 9851980864 is 4680891589.

It is a junction number, because it is equal to n+sod(n) for n = 9851980799 and 9851980808.

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 7 ways as a sum of consecutive naturals, for example, 724722 + ... + 738190.

Almost surely, 2^9851980864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9851980864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10674705600).

9851980864 is an abundant number, since it is smaller than the sum of its proper divisors (11497430336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9851980864 is a wasteful number, since it uses less digits than its factorization.

9851980864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14531 (or 14521 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 58.

The square root of 9851980864 is about 99257.1451533843. The cubic root of 9851980864 is about 2143.7518880110.

The spelling of 9851980864 in words is "nine billion, eight hundred fifty-one million, nine hundred eighty thousand, eight hundred sixty-four".