671587156 has 12 divisors (see below), whose sum is σ = 1175670580. Its totient is φ = 335681280.

The previous prime is 671587151. The next prime is 671587157. The reversal of 671587156 is 651785176.

It can be written as a sum of positive squares in 2 ways, for example, as 629207056 + 42380100 = 25084^2 + 6510^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671587151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13815 + ... + 39166.

Almost surely, 2^671587156 is an apocalyptic number.

It is an amenable number.

671587156 is a deficient number, since it is larger than the sum of its proper divisors (504083424).

671587156 is a wasteful number, since it uses less digits than its factorization.

671587156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56154 (or 56152 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The square root of 671587156 is about 25914.9986687246. The cubic root of 671587156 is about 875.7244203796.

The spelling of 671587156 in words is "six hundred seventy-one million, five hundred eighty-seven thousand, one hundred fifty-six".