181368689130 has 48 divisors (see below), whose sum is σ = 471613020840. Its totient is φ = 48359401344.

The previous prime is 181368689119. The next prime is 181368689147. The reversal of 181368689130 is 31986863181.

181368689130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 139137206121 + 42231483009 = 373011^2 + 205503^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 699376 + ... + 922964.

Almost surely, 2^181368689130 is an apocalyptic number.

181368689130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181368689130 is an abundant number, since it is smaller than the sum of its proper divisors (290244331710).

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

181368689130 is a wasteful number, since it uses less digits than its factorization.

181368689130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232615 (or 232612 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 181368689130 in words is "one hundred eighty-one billion, three hundred sixty-eight million, six hundred eighty-nine thousand, one hundred thirty".