671879615543 has 6 divisors (see below), whose sum is σ = 686180665584. Its totient is φ = 657578804676.

The previous prime is 671879615497. The next prime is 671879615569. The reversal of 671879615543 is 345516978176.

It is a happy number.

It is not a de Polignac number, because 671879615543 - 2³⁶ = 603160138807 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 (671879015543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5559680 + ... + 5679242.

It is an arithmetic number, because the mean of its divisors is an integer number (114363444264).

Almost surely, 2^671879615543 is an apocalyptic number.

671879615543 is a deficient number, since it is larger than the sum of its proper divisors (14301050041).

671879615543 is an frugal number, since it uses more digits than its factorization.

671879615543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239173 (or 119610 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 62.

The spelling of 671879615543 in words is "six hundred seventy-one billion, eight hundred seventy-nine million, six hundred fifteen thousand, five hundred forty-three".