9980463640 has 256 divisors, whose sum is σ = 28302336000. Its totient is φ = 3090493440.

The previous prime is 9980463629. The next prime is 9980463641. The reversal of 9980463640 is 463640899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980463641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12038746 + ... + 12039574.

It is an arithmetic number, because the mean of its divisors is an integer number (110556000).

Almost surely, 2^9980463640 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 9980463640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14151168000).

9980463640 is an abundant number, since it is smaller than the sum of its proper divisors (18321872360).

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

9980463640 is a wasteful number, since it uses less digits than its factorization.

9980463640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 9980463640 is about 99902.2704446701. The cubic root of 9980463640 is about 2153.0307816692.

The spelling of 9980463640 in words is "nine billion, nine hundred eighty million, four hundred sixty-three thousand, six hundred forty".