181420486183938 has 32 divisors (see below), whose sum is σ = 367815124063296. Its totient is φ = 59644486902528.

The previous prime is 181420486183927. The next prime is 181420486184009. The reversal of 181420486183938 is 839381684024181.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42239281 + ... + 46335707.

It is an arithmetic number, because the mean of its divisors is an integer number (11494222626978).

Almost surely, 2^{181420486183938} is an apocalyptic number.

181420486183938 is an abundant number, since it is smaller than the sum of its proper divisors (186394637879358).

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

181420486183938 is a wasteful number, since it uses less digits than its factorization.

181420486183938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197618.

The product of its (nonzero) digits is 63700992, while the sum is 66.

The spelling of 181420486183938 in words is "one hundred eighty-one trillion, four hundred twenty billion, four hundred eighty-six million, one hundred eighty-three thousand, nine hundred thirty-eight".