181909782814652 has 48 divisors (see below), whose sum is σ = 337239350558880. Its totient is φ = 85616919648000.

The previous prime is 181909782814637. The next prime is 181909782814657. The reversal of 181909782814652 is 256418287909181.

It is a super-2 number, since 2×181909782814652² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181909782814657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580466402 + ... + 580779702.

It is an arithmetic number, because the mean of its divisors is an integer number (7025819803310).

Almost surely, 2^{181909782814652} is an apocalyptic number.

It is an amenable number.

181909782814652 is a deficient number, since it is larger than the sum of its proper divisors (155329567744228).

181909782814652 is a wasteful number, since it uses less digits than its factorization.

181909782814652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362142 (or 362140 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 71.

The spelling of 181909782814652 in words is "one hundred eighty-one trillion, nine hundred nine billion, seven hundred eighty-two million, eight hundred fourteen thousand, six hundred fifty-two".