671346812181 has 8 divisors (see below), whose sum is σ = 895879405440. Its totient is φ = 447189380192.

The previous prime is 671346812179. The next prime is 671346812207. The reversal of 671346812181 is 181218643176.

671346812181 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 671346812181 - 2¹ = 671346812179 is a prime.

It is a super-2 number, since 2×671346812181² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 671346812181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671346812111) 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, 93786141 + ... + 93793298.

It is an arithmetic number, because the mean of its divisors is an integer number (111984925680).

Almost surely, 2^671346812181 is an apocalyptic number.

It is an amenable number.

671346812181 is a deficient number, since it is larger than the sum of its proper divisors (224532593259).

671346812181 is a wasteful number, since it uses less digits than its factorization.

671346812181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187580635.

The product of its digits is 387072, while the sum is 48.

The spelling of 671346812181 in words is "six hundred seventy-one billion, three hundred forty-six million, eight hundred twelve thousand, one hundred eighty-one".