642453282866 has 16 divisors (see below), whose sum is σ = 972247449600. Its totient is φ = 318371030208.

The previous prime is 642453282847. The next prime is 642453282881. The reversal of 642453282866 is 668282354246.

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, 8059955 + ... + 8139273.

It is an arithmetic number, because the mean of its divisors is an integer number (60765465600).

Almost surely, 2^642453282866 is an apocalyptic number.

642453282866 is a deficient number, since it is larger than the sum of its proper divisors (329794166734).

642453282866 is a wasteful number, since it uses less digits than its factorization.

642453282866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115273.

The product of its digits is 26542080, while the sum is 56.

The spelling of 642453282866 in words is "six hundred forty-two billion, four hundred fifty-three million, two hundred eighty-two thousand, eight hundred sixty-six".