421444841517 has 18 divisors (see below), whose sum is σ = 708142013358. Its totient is φ = 240825623472.

The previous prime is 421444841501. The next prime is 421444841567. The reversal of 421444841517 is 715148444124.

421444841517 is a `hidden beast` number, since 4 + 2 + 14 + 4 + 484 + 151 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 233410731876 + 188034109641 = 483126^2 + 433629^2 .

It is not a de Polignac number, because 421444841517 - 2⁴ = 421444841501 is a prime.

It is a super-2 number, since 2×421444841517² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421444841567) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 477828178 + ... + 477829059.

Almost surely, 2^421444841517 is an apocalyptic number.

It is an amenable number.

421444841517 is a deficient number, since it is larger than the sum of its proper divisors (286697171841).

421444841517 is a wasteful number, since it uses less digits than its factorization.

421444841517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955657257 (or 955657247 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The spelling of 421444841517 in words is "four hundred twenty-one billion, four hundred forty-four million, eight hundred forty-one thousand, five hundred seventeen".