671974891541 has 8 divisors (see below), whose sum is σ = 688428720000. Its totient is φ = 655524120160.

The previous prime is 671974891501. The next prime is 671974891579. The reversal of 671974891541 is 145198479176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671974891541 - 2¹⁴ = 671974875157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671974891501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316091 + ... + 1201608.

It is an arithmetic number, because the mean of its divisors is an integer number (86053590000).

Almost surely, 2^671974891541 is an apocalyptic number.

It is an amenable number.

671974891541 is a deficient number, since it is larger than the sum of its proper divisors (16453828459).

671974891541 is a wasteful number, since it uses less digits than its factorization.

671974891541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528539.

The product of its digits is 15240960, while the sum is 62.

The spelling of 671974891541 in words is "six hundred seventy-one billion, nine hundred seventy-four million, eight hundred ninety-one thousand, five hundred forty-one".