9438137680 has 80 divisors (see below), whose sum is σ = 22957530624. Its totient is φ = 3604751360.

The previous prime is 9438137651. The next prime is 9438137689. The reversal of 9438137680 is 867318349.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9438137689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123549 + ... + 184771.

Almost surely, 2^9438137680 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 9438137680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11478765312).

9438137680 is an abundant number, since it is smaller than the sum of its proper divisors (13519392944).

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

9438137680 is a wasteful number, since it uses less digits than its factorization.

9438137680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61324 (or 61318 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 9438137680 is about 97150.0781265769. The cubic root of 9438137680 is about 2113.3046215641.

The spelling of 9438137680 in words is "nine billion, four hundred thirty-eight million, one hundred thirty-seven thousand, six hundred eighty".