643212424212305 has 32 divisors (see below), whose sum is σ = 818083650182400. Its totient is φ = 483811980134400.

The previous prime is 643212424212299. The next prime is 643212424212307. The reversal of 643212424212305 is 503212424212346.

It is not a de Polignac number, because 643212424212305 - 2¹⁰ = 643212424211281 is a prime.

It is a super-3 number, since 3×643212424212305³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (643212424212307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1644987932 + ... + 1645378898.

It is an arithmetic number, because the mean of its divisors is an integer number (25565114068200).

Almost surely, 2^{643212424212305} is an apocalyptic number.

It is an amenable number.

643212424212305 is a deficient number, since it is larger than the sum of its proper divisors (174871225970095).

643212424212305 is a wasteful number, since it uses less digits than its factorization.

643212424212305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410489.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 643212424212305 its sum of digits (41), we get a palindrome (643212424212346).

The spelling of 643212424212305 in words is "six hundred forty-three trillion, two hundred twelve billion, four hundred twenty-four million, two hundred twelve thousand, three hundred five".