671223836943 has 64 divisors (see below), whose sum is σ = 1099933286400. Its totient is φ = 401162842080.

The previous prime is 671223836917. The next prime is 671223836981. The reversal of 671223836943 is 349638322176.

671223836943 is a `hidden beast` number, since 6 + 7 + 1 + 2 + 238 + 369 + 43 = 666.

It is not a de Polignac number, because 671223836943 - 2⁸ = 671223836687 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 671223836943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671223837943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7265346 + ... + 7357152.

It is an arithmetic number, because the mean of its divisors is an integer number (17186457600).

Almost surely, 2^671223836943 is an apocalyptic number.

671223836943 is a deficient number, since it is larger than the sum of its proper divisors (428709449457).

671223836943 is a wasteful number, since it uses less digits than its factorization.

671223836943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92169 (or 92163 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The spelling of 671223836943 in words is "six hundred seventy-one billion, two hundred twenty-three million, eight hundred thirty-six thousand, nine hundred forty-three".