9855071040 has 112 divisors (see below), whose sum is σ = 31313737728. Its totient is φ = 2626013184.

The previous prime is 9855070963. The next prime is 9855071047. The reversal of 9855071040 is 401705589.

It is a self number, because there is not a number n which added to its sum of digits gives 9855071040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855071047) 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, 1593394 + ... + 1599566.

It is an arithmetic number, because the mean of its divisors is an integer number (279586944).

Almost surely, 2^9855071040 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 9855071040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15656868864).

9855071040 is an abundant number, since it is smaller than the sum of its proper divisors (21458666688).

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

9855071040 is a wasteful number, since it uses less digits than its factorization.

9855071040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7856 (or 7846 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 9855071040 is about 99272.7104495490. The cubic root of 9855071040 is about 2143.9760012536.

The spelling of 9855071040 in words is "nine billion, eight hundred fifty-five million, seventy-one thousand, forty".