842144668 has 6 divisors (see below), whose sum is σ = 1473753176. Its totient is φ = 421072332.

The previous prime is 842144663. The next prime is 842144683. The reversal of 842144668 is 866441248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842144663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105268080 + ... + 105268087.

Almost surely, 2^842144668 is an apocalyptic number.

It is an amenable number.

842144668 is a deficient number, since it is larger than the sum of its proper divisors (631608508).

842144668 is a wasteful number, since it uses less digits than its factorization.

842144668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210536171 (or 210536169 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 842144668 is about 29019.7289442889. The cubic root of 842144668 is about 944.3411205546.

The spelling of 842144668 in words is "eight hundred forty-two million, one hundred forty-four thousand, six hundred sixty-eight".