671861259 has 24 divisors (see below), whose sum is σ = 989284400. Its totient is φ = 439266240.

The previous prime is 671861227. The next prime is 671861263. The reversal of 671861259 is 952168176.

It is not a de Polignac number, because 671861259 - 2⁵ = 671861227 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671861269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206457 + ... + 209685.

Almost surely, 2^671861259 is an apocalyptic number.

671861259 is a deficient number, since it is larger than the sum of its proper divisors (317423141).

671861259 is a wasteful number, since it uses less digits than its factorization.

671861259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675 (or 3672 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 671861259 is about 25920.2866303596. The cubic root of 671861259 is about 875.8435441794.

The spelling of 671861259 in words is "six hundred seventy-one million, eight hundred sixty-one thousand, two hundred fifty-nine".