643251211141 has 16 divisors (see below), whose sum is σ = 802000539648. Its totient is φ = 501219082800.

The previous prime is 643251211091. The next prime is 643251211177. The reversal of 643251211141 is 141112152346.

It is a cyclic number.

It is not a de Polignac number, because 643251211141 - 2¹⁹ = 643250686853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643251211181) 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 15 ways as a sum of consecutive naturals, for example, 2773156 + ... + 2996146.

It is an arithmetic number, because the mean of its divisors is an integer number (50125033728).

Almost surely, 2^643251211141 is an apocalyptic number.

It is an amenable number.

643251211141 is a deficient number, since it is larger than the sum of its proper divisors (158749328507).

643251211141 is a wasteful number, since it uses less digits than its factorization.

643251211141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260472.

The product of its digits is 5760, while the sum is 31.

Adding to 643251211141 its reverse (141112152346), we get a palindrome (784363363487).

The spelling of 643251211141 in words is "six hundred forty-three billion, two hundred fifty-one million, two hundred eleven thousand, one hundred forty-one".