642426424624246 has 8 divisors (see below), whose sum is σ = 963658891779840. Its totient is φ = 321206794030968.

The previous prime is 642426424624211. The next prime is 642426424624301.

642426424624246 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×642426424624246² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209015461 + ... + 3209215648.

It is an arithmetic number, because the mean of its divisors is an integer number (120457361472480).

Almost surely, 2^{642426424624246} is an apocalyptic number.

642426424624246 is a deficient number, since it is larger than the sum of its proper divisors (321232467155594).

642426424624246 is a wasteful number, since it uses less digits than its factorization.

642426424624246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418281158.

The product of its digits is 169869312, while the sum is 58.

The spelling of 642426424624246 in words is "six hundred forty-two trillion, four hundred twenty-six billion, four hundred twenty-four million, six hundred twenty-four thousand, two hundred forty-six".