643536206063 has 8 divisors (see below), whose sum is σ = 644640971328. Its totient is φ = 642432145824.

The previous prime is 643536206039. The next prime is 643536206101. The reversal of 643536206063 is 360602635346.

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 643536206063 - 2²⁴ = 643519428847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643536206003) 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, 1667381 + ... + 2016737.

It is an arithmetic number, because the mean of its divisors is an integer number (80580121416).

Almost surely, 2^643536206063 is an apocalyptic number.

643536206063 is a deficient number, since it is larger than the sum of its proper divisors (1104765265).

643536206063 is a wasteful number, since it uses less digits than its factorization.

643536206063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352513.

The product of its (nonzero) digits is 1399680, while the sum is 44.

The spelling of 643536206063 in words is "six hundred forty-three billion, five hundred thirty-six million, two hundred six thousand, sixty-three".