642288281284 has 24 divisors (see below), whose sum is σ = 1215894498560. Its totient is φ = 295111409184.

The previous prime is 642288281237. The next prime is 642288281287. The reversal of 642288281284 is 482182882246.

642288281284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (642288281287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27682794 + ... + 27705985.

Almost surely, 2^642288281284 is an apocalyptic number.

It is an amenable number.

642288281284 is a deficient number, since it is larger than the sum of its proper divisors (573606217276).

642288281284 is a wasteful number, since it uses less digits than its factorization.

642288281284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55389019 (or 55389017 counting only the distinct ones).

The product of its digits is 6291456, while the sum is 55.

The spelling of 642288281284 in words is "six hundred forty-two billion, two hundred eighty-eight million, two hundred eighty-one thousand, two hundred eighty-four".