671643313550 has 96 divisors (see below), whose sum is σ = 1389265750944. Its totient is φ = 239500352000.

The previous prime is 671643313543. The next prime is 671643313597. The reversal of 671643313550 is 55313346176.

It is a super-2 number, since 2×671643313550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69401312 + ... + 69410988.

It is an arithmetic number, because the mean of its divisors is an integer number (14471518239).

Almost surely, 2^671643313550 is an apocalyptic number.

671643313550 is an abundant number, since it is smaller than the sum of its proper divisors (717622437394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671643313550 is a wasteful number, since it uses less digits than its factorization.

671643313550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12134 (or 12129 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 671643313550 in words is "six hundred seventy-one billion, six hundred forty-three million, three hundred thirteen thousand, five hundred fifty".