646423430203 has 8 divisors (see below), whose sum is σ = 702946942272. Its totient is φ = 591955318656.

The previous prime is 646423430189. The next prime is 646423430209. The reversal of 646423430203 is 302034324646.

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 646423430203 - 2⁵ = 646423430171 is a prime.

It is a super-2 number, since 2×646423430203² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646423430209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513849475 + ... + 513850732.

It is an arithmetic number, because the mean of its divisors is an integer number (87868367784).

Almost surely, 2^646423430203 is an apocalyptic number.

646423430203 is a deficient number, since it is larger than the sum of its proper divisors (56523512069).

646423430203 is a wasteful number, since it uses less digits than its factorization.

646423430203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027700261.

The product of its (nonzero) digits is 248832, while the sum is 37.

Adding to 646423430203 its reverse (302034324646), we get a palindrome (948457754849).

The spelling of 646423430203 in words is "six hundred forty-six billion, four hundred twenty-three million, four hundred thirty thousand, two hundred three".