181782105780 has 96 divisors (see below), whose sum is σ = 556862584320. Its totient is φ = 43941335680.

The previous prime is 181782105773. The next prime is 181782105793. The reversal of 181782105780 is 87501287181.

181782105780 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181782105780² (a number of 23 digits) contains 22 as substring.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 167850 + ... + 625889.

It is an arithmetic number, because the mean of its divisors is an integer number (5800651920).

Almost surely, 2^181782105780 is an apocalyptic number.

181782105780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181782105780 is an abundant number, since it is smaller than the sum of its proper divisors (375080478540).

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

181782105780 is a wasteful number, since it uses less digits than its factorization.

181782105780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794109 (or 794107 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 48.

The spelling of 181782105780 in words is "one hundred eighty-one billion, seven hundred eighty-two million, one hundred five thousand, seven hundred eighty".