181241322672 has 40 divisors (see below), whose sum is σ = 469288112944. Its totient is φ = 60274243584.

The previous prime is 181241322671. The next prime is 181241322697. The reversal of 181241322672 is 276223142181.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 181241322672.

It is not an unprimeable number, because it can be changed into a prime (181241322671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4339333 + ... + 4380900.

Almost surely, 2^181241322672 is an apocalyptic number.

181241322672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181241322672 is an abundant number, since it is smaller than the sum of its proper divisors (288046790272).

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

181241322672 is a wasteful number, since it uses less digits than its factorization.

181241322672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8720677 (or 8720671 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The spelling of 181241322672 in words is "one hundred eighty-one billion, two hundred forty-one million, three hundred twenty-two thousand, six hundred seventy-two".