671642158871 has 8 divisors (see below), whose sum is σ = 707710984320. Its totient is φ = 635645257272.

The previous prime is 671642158813. The next prime is 671642158919. The reversal of 671642158871 is 178851246176.

671642158871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 671642158871 - 2³⁴ = 654462289687 is a prime.

It is a super-2 number, since 2×671642158871² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671642158801) 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, 17961785 + ... + 17999138.

It is an arithmetic number, because the mean of its divisors is an integer number (88463873040).

Almost surely, 2^671642158871 is an apocalyptic number.

671642158871 is a deficient number, since it is larger than the sum of its proper divisors (36068825449).

671642158871 is a wasteful number, since it uses less digits than its factorization.

671642158871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35961925.

The product of its digits is 4515840, while the sum is 56.

The spelling of 671642158871 in words is "six hundred seventy-one billion, six hundred forty-two million, one hundred fifty-eight thousand, eight hundred seventy-one".