9805915128156 has 48 divisors (see below), whose sum is σ = 26166551712000. Its totient is φ = 2799820961280.

The previous prime is 9805915128059. The next prime is 9805915128169. The reversal of 9805915128156 is 6518215195089.

It is a self number, because there is not a number n which added to its sum of digits gives 9805915128156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38812405 + ... + 39064236.

It is an arithmetic number, because the mean of its divisors is an integer number (545136494000).

Almost surely, 2^{9805915128156} is an apocalyptic number.

It is an amenable number.

9805915128156 is an abundant number, since it is smaller than the sum of its proper divisors (16360636583844).

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

9805915128156 is a wasteful number, since it uses less digits than its factorization.

9805915128156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77878154 (or 77878152 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 60.

The spelling of 9805915128156 in words is "nine trillion, eight hundred five billion, nine hundred fifteen million, one hundred twenty-eight thousand, one hundred fifty-six".