643144063 has 8 divisors (see below), whose sum is σ = 653664960. Its totient is φ = 632704800.

The previous prime is 643144043. The next prime is 643144079. The reversal of 643144063 is 360441346.

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 643144063 - 2⁵ = 643144031 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 (643144013) 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, 4423 + ... + 36136.

It is an arithmetic number, because the mean of its divisors is an integer number (81708120).

Almost surely, 2^643144063 is an apocalyptic number.

643144063 is a deficient number, since it is larger than the sum of its proper divisors (10520897).

643144063 is a wasteful number, since it uses less digits than its factorization.

643144063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40817.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 643144063 is about 25360.2851521823. The cubic root of 643144063 is about 863.1827544395.

The spelling of 643144063 in words is "six hundred forty-three million, one hundred forty-four thousand, sixty-three".