643310534342 has 8 divisors (see below), whose sum is σ = 1102818058896. Its totient is φ = 275704514712.

The previous prime is 643310534333. The next prime is 643310534381. The reversal of 643310534342 is 243435013346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×643310534342² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 643310534296 and 643310534305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22975376213 + ... + 22975376240.

It is an arithmetic number, because the mean of its divisors is an integer number (137852257362).

Almost surely, 2^643310534342 is an apocalyptic number.

643310534342 is a deficient number, since it is larger than the sum of its proper divisors (459507524554).

643310534342 is a wasteful number, since it uses less digits than its factorization.

643310534342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45950752462.

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 643310534342 its reverse (243435013346), we get a palindrome (886745547688).

The spelling of 643310534342 in words is "six hundred forty-three billion, three hundred ten million, five hundred thirty-four thousand, three hundred forty-two".