28181008163056 has 160 divisors (see below), whose sum is σ = 64398168253440. Its totient is φ = 11697106317312.

The previous prime is 28181008163051. The next prime is 28181008163057. The reversal of 28181008163056 is 65036180018182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181008163051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 602534040 + ... + 602580808.

It is an arithmetic number, because the mean of its divisors is an integer number (402488551584).

Almost surely, 2^{28181008163056} 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 28181008163056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32199084126720).

28181008163056 is an abundant number, since it is smaller than the sum of its proper divisors (36217160090384).

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

28181008163056 is a wasteful number, since it uses less digits than its factorization.

28181008163056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48143 (or 48137 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 28181008163056 in words is "twenty-eight trillion, one hundred eighty-one billion, eight million, one hundred sixty-three thousand, fifty-six".