642463455212 has 24 divisors (see below), whose sum is σ = 1143225326880. Its totient is φ = 315867530880.

The previous prime is 642463455203. The next prime is 642463455281. The reversal of 642463455212 is 212554364246.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 4920848 + ... + 5049719.

It is an arithmetic number, because the mean of its divisors is an integer number (47634388620).

Almost surely, 2^642463455212 is an apocalyptic number.

It is an amenable number.

642463455212 is a deficient number, since it is larger than the sum of its proper divisors (500761871668).

642463455212 is a wasteful number, since it uses less digits than its factorization.

642463455212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9970841 (or 9970839 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 44.

The spelling of 642463455212 in words is "six hundred forty-two billion, four hundred sixty-three million, four hundred fifty-five thousand, two hundred twelve".