643514464241 has 16 divisors (see below), whose sum is σ = 704216177280. Its totient is φ = 583180625280.

The previous prime is 643514464237. The next prime is 643514464247. The reversal of 643514464241 is 142464415346.

It is a happy number.

It is not a de Polignac number, because 643514464241 - 2² = 643514464237 is a prime.

It is a super-2 number, since 2×643514464241² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643514464192 and 643514464201.

It is not an unprimeable number, because it can be changed into a prime (643514464247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11966285 + ... + 12019941.

It is an arithmetic number, because the mean of its divisors is an integer number (44013511080).

Almost surely, 2^643514464241 is an apocalyptic number.

It is an amenable number.

643514464241 is a deficient number, since it is larger than the sum of its proper divisors (60701713039).

643514464241 is a wasteful number, since it uses less digits than its factorization.

643514464241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57064.

The product of its digits is 1105920, while the sum is 44.

Adding to 643514464241 its reverse (142464415346), we get a palindrome (785978879587).

The spelling of 643514464241 in words is "six hundred forty-three billion, five hundred fourteen million, four hundred sixty-four thousand, two hundred forty-one".