9999678210048 has 336 divisors, whose sum is σ = 30031276192035. Its totient is φ = 3328074252288.

The previous prime is 9999678210031. The next prime is 9999678210073. The reversal of 9999678210048 is 8400128769999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 4999839105024 + 4999839105024 = 2236032^2 + 2236032^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2236032.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 15455452861 + ... + 15455453507.

Almost surely, 2^{9999678210048} 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 9999678210048

9999678210048 is an abundant number, since it is smaller than the sum of its proper divisors (20031597981987).

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

9999678210048 is an frugal number, since it uses more digits than its factorization.

9999678210048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

Multiplying 9999678210048 by its sum of digits (72), we get a square (719976831123456 = 26832384²).

9999678210048 divided by its sum of digits (72) gives a square (138884419584 = 372672²).

The spelling of 9999678210048 in words is "nine trillion, nine hundred ninety-nine billion, six hundred seventy-eight million, two hundred ten thousand, forty-eight".