642442512208 has 40 divisors (see below), whose sum is σ = 1422695469440. Its totient is φ = 275304597120.

The previous prime is 642442512199. The next prime is 642442512223. The reversal of 642442512208 is 802215244246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838678 + ... + 1410058.

It is an arithmetic number, because the mean of its divisors is an integer number (35567386736).

Almost surely, 2^642442512208 is an apocalyptic number.

It is an amenable number.

642442512208 is an abundant number, since it is smaller than the sum of its proper divisors (780252957232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642442512208 is a wasteful number, since it uses less digits than its factorization.

642442512208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581435 (or 581429 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 642442512208 in words is "six hundred forty-two billion, four hundred forty-two million, five hundred twelve thousand, two hundred eight".