181163363328 has 66 divisors (see below), whose sum is σ = 523105306724. Its totient is φ = 60387784704.

The previous prime is 181163363317. The next prime is 181163363387. The reversal of 181163363328 is 823363361181.

181163363328 is a `hidden beast` number, since 1 + 8 + 1 + 1 + 6 + 3 + 3 + 633 + 2 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9819526 + ... + 9837957.

Almost surely, 2^181163363328 is an apocalyptic number.

181163363328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

181163363328 is an abundant number, since it is smaller than the sum of its proper divisors (341941943396).

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

181163363328 is a wasteful number, since it uses less digits than its factorization.

181163363328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19657509 (or 19657488 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 181163363328 in words is "one hundred eighty-one billion, one hundred sixty-three million, three hundred sixty-three thousand, three hundred twenty-eight".