642643346246 has 16 divisors (see below), whose sum is σ = 1052715769488. Its totient is φ = 291800176800.

The previous prime is 642643346227. The next prime is 642643346291.

642643346246 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 642643346194 and 642643346203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15500585 + ... + 15541988.

It is an arithmetic number, because the mean of its divisors is an integer number (65794735593).

Almost surely, 2^642643346246 is an apocalyptic number.

642643346246 is a deficient number, since it is larger than the sum of its proper divisors (410072423242).

642643346246 is a wasteful number, since it uses less digits than its factorization.

642643346246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31043527.

The product of its digits is 11943936, while the sum is 50.

It can be divided in two parts, 642643 and 346246, that added together give a palindrome (988889).

The spelling of 642643346246 in words is "six hundred forty-two billion, six hundred forty-three million, three hundred forty-six thousand, two hundred forty-six".