671748713999 has 4 divisors (see below), whose sum is σ = 732816778920. Its totient is φ = 610680649080.

The previous prime is 671748713969. The next prime is 671748714023. The reversal of 671748713999 is 999317847176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671748713999 - 2²⁰ = 671747665423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671748713969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30534032444 + ... + 30534032465.

It is an arithmetic number, because the mean of its divisors is an integer number (183204194730).

Almost surely, 2^671748713999 is an apocalyptic number.

671748713999 is a deficient number, since it is larger than the sum of its proper divisors (61068064921).

671748713999 is a wasteful number, since it uses less digits than its factorization.

671748713999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61068064920.

The product of its digits is 144027072, while the sum is 71.

The spelling of 671748713999 in words is "six hundred seventy-one billion, seven hundred forty-eight million, seven hundred thirteen thousand, nine hundred ninety-nine".