642267376252 has 18 divisors (see below), whose sum is σ = 1138375488768. Its totient is φ = 317068692408.

The previous prime is 642267376183. The next prime is 642267376253. The reversal of 642267376252 is 252673762246.

642267376252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642267376252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642267376253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12838908 + ... + 12888835.

Almost surely, 2^642267376252 is an apocalyptic number.

It is an amenable number.

642267376252 is a deficient number, since it is larger than the sum of its proper divisors (496108112516).

642267376252 is a wasteful number, since it uses less digits than its factorization.

642267376252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25727905 (or 25727824 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 52.

The spelling of 642267376252 in words is "six hundred forty-two billion, two hundred sixty-seven million, three hundred seventy-six thousand, two hundred fifty-two".