646142241646 has 12 divisors (see below), whose sum is σ = 1065333696336. Its totient is φ = 293701018820.

The previous prime is 646142241587. The next prime is 646142241653.

646142241646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 646142241596 and 646142241605.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1335004390 + ... + 1335004873.

It is an arithmetic number, because the mean of its divisors is an integer number (88777808028).

Almost surely, 2^646142241646 is an apocalyptic number.

646142241646 is a deficient number, since it is larger than the sum of its proper divisors (419191454690).

646142241646 is a wasteful number, since it uses less digits than its factorization.

646142241646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670009287 (or 2670009276 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 46.

It can be divided in two parts, 646142 and 241646, that added together give a palindrome (887788).

The spelling of 646142241646 in words is "six hundred forty-six billion, one hundred forty-two million, two hundred forty-one thousand, six hundred forty-six".