671493156 has 12 divisors (see below), whose sum is σ = 1566817392. Its totient is φ = 223831048.

The previous prime is 671493113. The next prime is 671493169. The reversal of 671493156 is 651394176.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27978870 + ... + 27978893.

It is an arithmetic number, because the mean of its divisors is an integer number (130568116).

Almost surely, 2^671493156 is an apocalyptic number.

It is an amenable number.

671493156 is an abundant number, since it is smaller than the sum of its proper divisors (895324236).

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

671493156 is a wasteful number, since it uses less digits than its factorization.

671493156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55957770 (or 55957768 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 671493156 is about 25913.1849837105. The cubic root of 671493156 is about 875.6835609838.

The spelling of 671493156 in words is "six hundred seventy-one million, four hundred ninety-three thousand, one hundred fifty-six".