671534523616205 has 8 divisors (see below), whose sum is σ = 806054670338400. Its totient is φ = 537085457560336.

The previous prime is 671534523616183. The next prime is 671534523616207. The reversal of 671534523616205 is 502616325435176.

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 671534523616205 - 2⁶ = 671534523616141 is a prime.

It is a super-3 number, since 3×671534523616205³ (a number of 45 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671534523616207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17770145795 + ... + 17770183584.

It is an arithmetic number, because the mean of its divisors is an integer number (100756833792300).

Almost surely, 2^{671534523616205} is an apocalyptic number.

It is an amenable number.

671534523616205 is a deficient number, since it is larger than the sum of its proper divisors (134520146722195).

671534523616205 is a wasteful number, since it uses less digits than its factorization.

671534523616205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35540333163.

The product of its (nonzero) digits is 27216000, while the sum is 56.

The spelling of 671534523616205 in words is "six hundred seventy-one trillion, five hundred thirty-four billion, five hundred twenty-three million, six hundred sixteen thousand, two hundred five".