643288343347 has 8 divisors (see below), whose sum is σ = 692788100480. Its totient is φ = 593790877440.

The previous prime is 643288343339. The next prime is 643288343353. The reversal of 643288343347 is 743343882346.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 643288343347 - 2³ = 643288343339 is a prime.

It is a super-2 number, since 2×643288343347² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643288343377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34147 + ... + 1134787.

It is an arithmetic number, because the mean of its divisors is an integer number (86598512560).

Almost surely, 2^643288343347 is an apocalyptic number.

643288343347 is a deficient number, since it is larger than the sum of its proper divisors (49499757133).

643288343347 is a wasteful number, since it uses less digits than its factorization.

643288343347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145613.

The product of its digits is 27869184, while the sum is 55.

The spelling of 643288343347 in words is "six hundred forty-three billion, two hundred eighty-eight million, three hundred forty-three thousand, three hundred forty-seven".