9855899405540 has 24 divisors (see below), whose sum is σ = 21786725002560. Its totient is φ = 3734867143008.

The previous prime is 9855899405413. The next prime is 9855899405543. The reversal of 9855899405540 is 455049985589.

It is not an unprimeable number, because it can be changed into a prime (9855899405543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12968288312 + ... + 12968289071.

It is an arithmetic number, because the mean of its divisors is an integer number (907780208440).

Almost surely, 2^{9855899405540} is an apocalyptic number.

It is an amenable number.

9855899405540 is an abundant number, since it is smaller than the sum of its proper divisors (11930825597020).

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

9855899405540 is a wasteful number, since it uses less digits than its factorization.

9855899405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25936577411 (or 25936577409 counting only the distinct ones).

The product of its (nonzero) digits is 466560000, while the sum is 71.

The spelling of 9855899405540 in words is "nine trillion, eight hundred fifty-five billion, eight hundred ninety-nine million, four hundred five thousand, five hundred forty".