542968668 has 72 divisors (see below), whose sum is σ = 1500145920. Its totient is φ = 164220960.

The previous prime is 542968649. The next prime is 542968691. The reversal of 542968668 is 866869245.

It is a happy number.

542968668 is a `hidden beast` number, since 542 + 96 + 8 + 6 + 6 + 8 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 283771 + ... + 285677.

It is an arithmetic number, because the mean of its divisors is an integer number (20835360).

Almost surely, 2^542968668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542968668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (750072960).

542968668 is an abundant number, since it is smaller than the sum of its proper divisors (957177252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

542968668 is a wasteful number, since it uses less digits than its factorization.

542968668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2642 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 542968668 is about 23301.6880933550. The cubic root of 542968668 is about 815.8148188494.

The spelling of 542968668 in words is "five hundred forty-two million, nine hundred sixty-eight thousand, six hundred sixty-eight".