671567212139 has 8 divisors (see below), whose sum is σ = 683510955120. Its totient is φ = 659642177536.

The previous prime is 671567212133. The next prime is 671567212177. The reversal of 671567212139 is 931212765176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671567212139 - 2⁸ = 671567211883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671567212133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4604654 + ... + 4748259.

It is an arithmetic number, because the mean of its divisors is an integer number (85438869390).

Almost surely, 2^671567212139 is an apocalyptic number.

671567212139 is a deficient number, since it is larger than the sum of its proper divisors (11943742981).

671567212139 is a wasteful number, since it uses less digits than its factorization.

671567212139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9354189.

The product of its digits is 952560, while the sum is 50.

The spelling of 671567212139 in words is "six hundred seventy-one billion, five hundred sixty-seven million, two hundred twelve thousand, one hundred thirty-nine".