642768766144 has 14 divisors (see below), whose sum is σ = 1275494270444. Its totient is φ = 321384383040.

The previous prime is 642768766141. The next prime is 642768766151. The reversal of 642768766144 is 441667867246.

It is not an unprimeable number, because it can be changed into a prime (642768766141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021630922 + ... + 5021631049.

Almost surely, 2^642768766144 is an apocalyptic number.

642768766144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

642768766144 is a deficient number, since it is larger than the sum of its proper divisors (632725504300).

642768766144 is a wasteful number, since it uses less digits than its factorization.

642768766144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043261983 (or 10043261973 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 61.

The spelling of 642768766144 in words is "six hundred forty-two billion, seven hundred sixty-eight million, seven hundred sixty-six thousand, one hundred forty-four".