1678142642 has 8 divisors (see below), whose sum is σ = 2746051632. Its totient is φ = 762792100.

The previous prime is 1678142593. The next prime is 1678142671. The reversal of 1678142642 is 2462418761.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1678142642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38139584 + ... + 38139627.

It is an arithmetic number, because the mean of its divisors is an integer number (343256454).

Almost surely, 2^1678142642 is an apocalyptic number.

1678142642 is a deficient number, since it is larger than the sum of its proper divisors (1067908990).

1678142642 is a wasteful number, since it uses less digits than its factorization.

1678142642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76279224.

The product of its digits is 129024, while the sum is 41.

The square root of 1678142642 is about 40965.1393504282. The cubic root of 1678142642 is about 1188.3461341246.

The spelling of 1678142642 in words is "one billion, six hundred seventy-eight million, one hundred forty-two thousand, six hundred forty-two".