643402342214203 has 24 divisors (see below), whose sum is σ = 761801466316464. Its totient is φ = 539783501864640.

The previous prime is 643402342214201. The next prime is 643402342214207. The reversal of 643402342214203 is 302412243204346.

It is not a de Polignac number, because 643402342214203 - 2¹ = 643402342214201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643402342214201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44650525 + ... + 57275422.

It is an arithmetic number, because the mean of its divisors is an integer number (31741727763186).

Almost surely, 2^{643402342214203} is an apocalyptic number.

643402342214203 is a deficient number, since it is larger than the sum of its proper divisors (118399124102261).

643402342214203 is a wasteful number, since it uses less digits than its factorization.

643402342214203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101929995 (or 101929984 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 40.

Adding to 643402342214203 its reverse (302412243204346), we get a palindrome (945814585418549).

The spelling of 643402342214203 in words is "six hundred forty-three trillion, four hundred two billion, three hundred forty-two million, two hundred fourteen thousand, two hundred three".