642286246808 has 8 divisors (see below), whose sum is σ = 1204286712780. Its totient is φ = 321143123400.

The previous prime is 642286246783. The next prime is 642286246813. The reversal of 642286246808 is 808642682246.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40142890418 + ... + 40142890433.

Almost surely, 2^642286246808 is an apocalyptic number.

It is an amenable number.

642286246808 is a deficient number, since it is larger than the sum of its proper divisors (562000465972).

642286246808 is a wasteful number, since it uses less digits than its factorization.

642286246808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80285780857 (or 80285780853 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 56.

The spelling of 642286246808 in words is "six hundred forty-two billion, two hundred eighty-six million, two hundred forty-six thousand, eight hundred eight".