9855598720 has 64 divisors (see below), whose sum is σ = 25702971840. Its totient is φ = 3583851520.

The previous prime is 9855598637. The next prime is 9855598747. The reversal of 9855598720 is 278955589.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×9855598720² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 692932 + ... + 707011.

It is an arithmetic number, because the mean of its divisors is an integer number (401608935).

Almost surely, 2^9855598720 is an apocalyptic number.

It is an amenable number.

9855598720 is an abundant number, since it is smaller than the sum of its proper divisors (15847373120).

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

9855598720 is a wasteful number, since it uses less digits than its factorization.

9855598720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399973 (or 1399961 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 58.

The square root of 9855598720 is about 99275.3681433617. The cubic root of 9855598720 is about 2144.0142662599.

The spelling of 9855598720 in words is "nine billion, eight hundred fifty-five million, five hundred ninety-eight thousand, seven hundred twenty".