421718571813 has 24 divisors (see below), whose sum is σ = 706349568064. Its totient is φ = 219074581440.

The previous prime is 421718571761. The next prime is 421718571893. The reversal of 421718571813 is 318175817124.

It is not a de Polignac number, because 421718571813 - 2²² = 421714377509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421718571893) 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 23 ways as a sum of consecutive naturals, for example, 82980256 + ... + 82985337.

Almost surely, 2^421718571813 is an apocalyptic number.

It is an amenable number.

421718571813 is a deficient number, since it is larger than the sum of its proper divisors (284630996251).

421718571813 is a wasteful number, since it uses less digits than its factorization.

421718571813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165965625 (or 165965614 counting only the distinct ones).

The product of its digits is 376320, while the sum is 48.

The spelling of 421718571813 in words is "four hundred twenty-one billion, seven hundred eighteen million, five hundred seventy-one thousand, eight hundred thirteen".