9889121560 has 16 divisors (see below), whose sum is σ = 22250523600. Its totient is φ = 3955648608.

The previous prime is 9889121537. The next prime is 9889121581. The reversal of 9889121560 is 651219889.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123613980 + ... + 123614059.

It is an arithmetic number, because the mean of its divisors is an integer number (1390657725).

Almost surely, 2^9889121560 is an apocalyptic number.

It is an amenable number.

9889121560 is an abundant number, since it is smaller than the sum of its proper divisors (12361402040).

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

9889121560 is a wasteful number, since it uses less digits than its factorization.

9889121560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247228050 (or 247228046 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 49.

The square root of 9889121560 is about 99444.0624672987. The cubic root of 9889121560 is about 2146.4423991671.

The spelling of 9889121560 in words is "nine billion, eight hundred eighty-nine million, one hundred twenty-one thousand, five hundred sixty".