643462426330 has 16 divisors (see below), whose sum is σ = 1158254552520. Its totient is φ = 257380040512.

The previous prime is 643462426309. The next prime is 643462426333. The reversal of 643462426330 is 33624264346.

It can be written as a sum of positive squares in 4 ways, for example, as 397425593889 + 246036832441 = 630417^2 + 496021^2 .

It is not an unprimeable number, because it can be changed into a prime (643462426333) 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, 42649 + ... + 1135228.

Almost surely, 2^643462426330 is an apocalyptic number.

643462426330 is a deficient number, since it is larger than the sum of its proper divisors (514792126190).

643462426330 is a wasteful number, since it uses less digits than its factorization.

643462426330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232513.

The product of its (nonzero) digits is 1492992, while the sum is 43.

The spelling of 643462426330 in words is "six hundred forty-three billion, four hundred sixty-two million, four hundred twenty-six thousand, three hundred thirty".