9864936780 has 48 divisors (see below), whose sum is σ = 27954630144. Its totient is φ = 2598953920.

The previous prime is 9864936773. The next prime is 9864936793. The reversal of 9864936780 is 876394689.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985476 + ... + 995435.

It is an arithmetic number, because the mean of its divisors is an integer number (582388128).

Almost surely, 2^9864936780 is an apocalyptic number.

It is an amenable number.

9864936780 is an abundant number, since it is smaller than the sum of its proper divisors (18089693364).

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

9864936780 is a wasteful number, since it uses less digits than its factorization.

9864936780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981006 (or 1981004 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 60.

The square root of 9864936780 is about 99322.3881106370. The cubic root of 9864936780 is about 2144.6911949971.

The spelling of 9864936780 in words is "nine billion, eight hundred sixty-four million, nine hundred thirty-six thousand, seven hundred eighty".