642217712246 has 16 divisors (see below), whose sum is σ = 1054897544448. Its totient is φ = 290807188200.

The previous prime is 642217712233. The next prime is 642217712249.

642217712246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642217712197 and 642217712206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642217712249) 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, 55491770 + ... + 55503341.

It is an arithmetic number, because the mean of its divisors is an integer number (65931096528).

Almost surely, 2^642217712246 is an apocalyptic number.

642217712246 is a deficient number, since it is larger than the sum of its proper divisors (412679832202).

642217712246 is a wasteful number, since it uses less digits than its factorization.

642217712246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110995387.

The product of its digits is 451584, while the sum is 44.

The spelling of 642217712246 in words is "six hundred forty-two billion, two hundred seventeen million, seven hundred twelve thousand, two hundred forty-six".