9855020635020 has 480 divisors, whose sum is σ = 35543787713280. Its totient is φ = 2260634365440.

The previous prime is 9855020635013. The next prime is 9855020635049. The reversal of 9855020635020 is 205360205589.

9855020635020 is a `hidden beast` number, since 9 + 8 + 5 + 5 + 0 + 2 + 0 + 635 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 288791679 + ... + 288825801.

It is an arithmetic number, because the mean of its divisors is an integer number (74049557736).

Almost surely, 2^{9855020635020} is an apocalyptic number.

9855020635020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9855020635020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17771893856640).

9855020635020 is an abundant number, since it is smaller than the sum of its proper divisors (25688767078260).

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

9855020635020 is a wasteful number, since it uses less digits than its factorization.

9855020635020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35027 (or 35016 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 9855020635020 in words is "nine trillion, eight hundred fifty-five billion, twenty million, six hundred thirty-five thousand, twenty".