9800999964 has 144 divisors (see below), whose sum is σ = 29354270400. Its totient is φ = 2697827328.

The previous prime is 9800999947. The next prime is 9800999981. The reversal of 9800999964 is 4699990089.

It is an interprime number because it is at equal distance from previous prime (9800999947) and next prime (9800999981).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4157074 + ... + 4159430.

It is an arithmetic number, because the mean of its divisors is an integer number (203849100).

It is a vampire number, since it can be written as 98994 ⋅ 99006 (with its own digits).

Almost surely, 2^9800999964 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 9800999964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14677135200).

9800999964 is an abundant number, since it is smaller than the sum of its proper divisors (19553270436).

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

9800999964 is a wasteful number, since it uses less digits than its factorization.

9800999964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2967 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 63.

The square root of 9800999964 is about 98999.9998181818. Note that the first 3 decimals coincide. The cubic root of 9800999964 is about 2140.0477442983.

The spelling of 9800999964 in words is "nine billion, eight hundred million, nine hundred ninety-nine thousand, nine hundred sixty-four".