642026217670 has 8 divisors (see below), whose sum is σ = 1155647191824. Its totient is φ = 256810487064.

The previous prime is 642026217667. The next prime is 642026217719. The reversal of 642026217670 is 76712620246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32101310874 + ... + 32101310893.

It is an arithmetic number, because the mean of its divisors is an integer number (144455898978).

Almost surely, 2^642026217670 is an apocalyptic number.

642026217670 is a deficient number, since it is larger than the sum of its proper divisors (513620974154).

642026217670 is a wasteful number, since it uses less digits than its factorization.

642026217670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64202621774.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 642026217670 in words is "six hundred forty-two billion, twenty-six million, two hundred seventeen thousand, six hundred seventy".