9937661888 has 224 divisors, whose sum is σ = 26264494080. Its totient is φ = 3615575040.

The previous prime is 9937661861. The next prime is 9937661891. The reversal of 9937661888 is 8881667399.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

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, 4872773 + ... + 4874811.

Almost surely, 2^9937661888 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 9937661888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13132247040).

9937661888 is an abundant number, since it is smaller than the sum of its proper divisors (16326832192).

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

9937661888 is a wasteful number, since it uses less digits than its factorization.

9937661888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2125 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 65.

The square root of 9937661888 is about 99687.8221649967. The cubic root of 9937661888 is about 2149.9485755142.

The spelling of 9937661888 in words is "nine billion, nine hundred thirty-seven million, six hundred sixty-one thousand, eight hundred eighty-eight".