642344464443246 has 8 divisors (see below), whose sum is σ = 1284688928886504. Its totient is φ = 214114821481080.

The previous prime is 642344464443151. The next prime is 642344464443247.

It is a happy number.

642344464443246 is nontrivially palindromic in base 10.

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

642344464443246 is an admirable number.

It is a super-2 number, since 2×642344464443246² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642344464443246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642344464443247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53528705370265 + ... + 53528705370276.

It is an arithmetic number, because the mean of its divisors is an integer number (160586116110813).

Almost surely, 2^{642344464443246} is an apocalyptic number.

642344464443246 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642344464443246 is a wasteful number, since it uses less digits than its factorization.

642344464443246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107057410740546.

The product of its digits is 509607936, while the sum is 60.

The spelling of 642344464443246 in words is "six hundred forty-two trillion, three hundred forty-four billion, four hundred sixty-four million, four hundred forty-three thousand, two hundred forty-six".