671555112 has 32 divisors (see below), whose sum is σ = 1694584800. Its totient is φ = 221758784.

The previous prime is 671555111. The next prime is 671555147. The reversal of 671555112 is 211555176.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (671555111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128187 + ... + 133322.

It is an arithmetic number, because the mean of its divisors is an integer number (52955775).

Almost surely, 2^671555112 is an apocalyptic number.

It is an amenable number.

671555112 is an abundant number, since it is smaller than the sum of its proper divisors (1023029688).

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

671555112 is a wasteful number, since it uses less digits than its factorization.

671555112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261625 (or 261621 counting only the distinct ones).

The product of its digits is 10500, while the sum is 33.

The square root of 671555112 is about 25914.3804093403. The cubic root of 671555112 is about 875.7104921007.

The spelling of 671555112 in words is "six hundred seventy-one million, five hundred fifty-five thousand, one hundred twelve".