181860056 has 32 divisors (see below), whose sum is σ = 391572480. Its totient is φ = 77565600.

The previous prime is 181860023. The next prime is 181860071. The reversal of 181860056 is 650068181.

It is a junction number, because it is equal to n+sod(n) for n = 181859998 and 181860025.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 4121 + ... + 19511.

It is an arithmetic number, because the mean of its divisors is an integer number (12236640).

Almost surely, 2^181860056 is an apocalyptic number.

It is an amenable number.

181860056 is an abundant number, since it is smaller than the sum of its proper divisors (209712424).

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

181860056 is a wasteful number, since it uses less digits than its factorization.

181860056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15615 (or 15611 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 181860056 is about 13485.5498960925. The cubic root of 181860056 is about 566.5598226857.

The spelling of 181860056 in words is "one hundred eighty-one million, eight hundred sixty thousand, fifty-six".