642768848867246 has 8 divisors (see below), whose sum is σ = 964201329647424. Its totient is φ = 321368405651440.

The previous prime is 642768848867213. The next prime is 642768848867267.

642768848867246 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8009340935 + ... + 8009421186.

It is an arithmetic number, because the mean of its divisors is an integer number (120525166205928).

Almost surely, 2^{642768848867246} is an apocalyptic number.

642768848867246 is a deficient number, since it is larger than the sum of its proper divisors (321432480780178).

642768848867246 is a wasteful number, since it uses less digits than its factorization.

642768848867246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16018782186.

The product of its digits is 66588770304, while the sum is 86.

The spelling of 642768848867246 in words is "six hundred forty-two trillion, seven hundred sixty-eight billion, eight hundred forty-eight million, eight hundred sixty-seven thousand, two hundred forty-six".