643144062 has 32 divisors (see below), whose sum is σ = 1405278720. Its totient is φ = 194606720.

The previous prime is 643144043. The next prime is 643144079. The reversal of 643144062 is 260441346.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40678 + ... + 54230.

It is an arithmetic number, because the mean of its divisors is an integer number (43914960).

Almost surely, 2^643144062 is an apocalyptic number.

643144062 is an abundant number, since it is smaller than the sum of its proper divisors (762134658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643144062 is a wasteful number, since it uses less digits than its factorization.

643144062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14288.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 643144062 is about 25360.2851324665. The cubic root of 643144062 is about 863.1827539921.

The spelling of 643144062 in words is "six hundred forty-three million, one hundred forty-four thousand, sixty-two".