9998745064 has 128 divisors (see below), whose sum is σ = 23775897600. Its totient is φ = 3829098240.

The previous prime is 9998745049. The next prime is 9998745073. The reversal of 9998745064 is 4605478999.

It is a junction number, because it is equal to n+sod(n) for n = 9998744993 and 9998745011.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13753069 + ... + 13753795.

It is an arithmetic number, because the mean of its divisors is an integer number (185749200).

Almost surely, 2^9998745064 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 9998745064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11887948800).

9998745064 is an abundant number, since it is smaller than the sum of its proper divisors (13777152536).

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

9998745064 is a wasteful number, since it uses less digits than its factorization.

9998745064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 61.

The square root of 9998745064 is about 99993.7251231296. The cubic root of 9998745064 is about 2154.3445636733.

The spelling of 9998745064 in words is "nine billion, nine hundred ninety-eight million, seven hundred forty-five thousand, sixty-four".