642846682 has 4 divisors (see below), whose sum is σ = 964270026. Its totient is φ = 321423340.

The previous prime is 642846679. The next prime is 642846697. The reversal of 642846682 is 286648246.

642846682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 363321721 + 279524961 = 19061^2 + 16719^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160711669 + ... + 160711672.

Almost surely, 2^642846682 is an apocalyptic number.

642846682 is a deficient number, since it is larger than the sum of its proper divisors (321423344).

642846682 is a wasteful number, since it uses less digits than its factorization.

642846682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321423343.

The product of its digits is 884736, while the sum is 46.

The square root of 642846682 is about 25354.4213501314. The cubic root of 642846682 is about 863.0496926370.

The spelling of 642846682 in words is "six hundred forty-two million, eight hundred forty-six thousand, six hundred eighty-two".