643141370 has 32 divisors (see below), whose sum is σ = 1176940800. Its totient is φ = 252997056.

The previous prime is 643141339. The next prime is 643141409. The reversal of 643141370 is 73141346.

It is a Curzon 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, 217361 + ... + 220299.

It is an arithmetic number, because the mean of its divisors is an integer number (36779400).

Almost surely, 2^643141370 is an apocalyptic number.

643141370 is a deficient number, since it is larger than the sum of its proper divisors (533799430).

643141370 is a wasteful number, since it uses less digits than its factorization.

643141370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 643141370 is about 25360.2320572979. The cubic root of 643141370 is about 863.1815496527.

The spelling of 643141370 in words is "six hundred forty-three million, one hundred forty-one thousand, three hundred seventy".