181161368576 has 88 divisors (see below), whose sum is σ = 377955951120. Its totient is φ = 86681649152.

The previous prime is 181161368449. The next prime is 181161368611. The reversal of 181161368576 is 675863161181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3328655 + ... + 3382641.

It is an arithmetic number, because the mean of its divisors is an integer number (4294953990).

Almost surely, 2^181161368576 is an apocalyptic number.

181161368576 is a gapful number since it is divisible by the number (16) 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 181161368576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188977975560).

181161368576 is an abundant number, since it is smaller than the sum of its proper divisors (196794582544).

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

181161368576 is a wasteful number, since it uses less digits than its factorization.

181161368576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54149 (or 54131 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 53.

The spelling of 181161368576 in words is "one hundred eighty-one billion, one hundred sixty-one million, three hundred sixty-eight thousand, five hundred seventy-six".