542687668 has 36 divisors (see below), whose sum is σ = 1052769312. Its totient is φ = 244266880.

The previous prime is 542687653. The next prime is 542687669. The reversal of 542687668 is 866786245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542687669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16383 + ... + 36793.

It is an arithmetic number, because the mean of its divisors is an integer number (29243592).

Almost surely, 2^542687668 is an apocalyptic number.

It is an amenable number.

542687668 is a deficient number, since it is larger than the sum of its proper divisors (510081644).

542687668 is a wasteful number, since it uses less digits than its factorization.

542687668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20472 (or 20453 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 52.

The square root of 542687668 is about 23295.6577069633. The cubic root of 542687668 is about 815.6740596396.

The spelling of 542687668 in words is "five hundred forty-two million, six hundred eighty-seven thousand, six hundred sixty-eight".