671532505085 has 16 divisors (see below), whose sum is σ = 868929390336. Its totient is φ = 495270773568.

The previous prime is 671532505073. The next prime is 671532505141. The reversal of 671532505085 is 580505235176.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 671532505085 - 2⁴ = 671532505069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6512549 + ... + 6614858.

It is an arithmetic number, because the mean of its divisors is an integer number (54308086896).

Almost surely, 2^671532505085 is an apocalyptic number.

671532505085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

671532505085 is a deficient number, since it is larger than the sum of its proper divisors (197396885251).

671532505085 is a wasteful number, since it uses less digits than its factorization.

671532505085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128212.

The product of its (nonzero) digits is 1260000, while the sum is 47.

The spelling of 671532505085 in words is "six hundred seventy-one billion, five hundred thirty-two million, five hundred five thousand, eighty-five".