643623313106 has 32 divisors (see below), whose sum is σ = 985692727296. Its totient is φ = 315125944000.

The previous prime is 643623313043. The next prime is 643623313117. The reversal of 643623313106 is 601313326346.

It is a super-3 number, since 3×643623313106³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 643623313106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17692496 + ... + 17728836.

It is an arithmetic number, because the mean of its divisors is an integer number (30802897728).

Almost surely, 2^643623313106 is an apocalyptic number.

643623313106 is a deficient number, since it is larger than the sum of its proper divisors (342069414190).

643623313106 is a wasteful number, since it uses less digits than its factorization.

643623313106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37258.

The product of its (nonzero) digits is 139968, while the sum is 38.

The spelling of 643623313106 in words is "six hundred forty-three billion, six hundred twenty-three million, three hundred thirteen thousand, one hundred six".