642268688603 has 2 divisors, whose sum is σ = 642268688604. Its totient is φ = 642268688602.

The previous prime is 642268688587. The next prime is 642268688687. The reversal of 642268688603 is 306886862246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642268688603 - 2⁴ = 642268688587 is a prime.

It is not a weakly prime, because it can be changed into another prime (642268688903) 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 as a sum of consecutive naturals, namely, 321134344301 + 321134344302.

It is an arithmetic number, because the mean of its divisors is an integer number (321134344302).

Almost surely, 2^642268688603 is an apocalyptic number.

642268688603 is a deficient number, since it is larger than the sum of its proper divisors (1).

642268688603 is an equidigital number, since it uses as much as digits as its factorization.

642268688603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31850496, while the sum is 59.

The spelling of 642268688603 in words is "six hundred forty-two billion, two hundred sixty-eight million, six hundred eighty-eight thousand, six hundred three".