181464648 has 32 divisors (see below), whose sum is σ = 461354400. Its totient is φ = 59462528.

The previous prime is 181464631. The next prime is 181464653. The reversal of 181464648 is 846464181.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62661 + ... + 65492.

It is an arithmetic number, because the mean of its divisors is an integer number (14417325).

Almost surely, 2^181464648 is an apocalyptic number.

It is an amenable number.

181464648 is an abundant number, since it is smaller than the sum of its proper divisors (279889752).

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

181464648 is a wasteful number, since it uses less digits than its factorization.

181464648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128221 (or 128217 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 181464648 is about 13470.8814856341. The cubic root of 181464648 is about 566.1489117773.

The spelling of 181464648 in words is "one hundred eighty-one million, four hundred sixty-four thousand, six hundred forty-eight".