68216642 has 16 divisors (see below), whose sum is σ = 113997240. Its totient is φ = 30398592.

The previous prime is 68216627. The next prime is 68216651. The reversal of 68216642 is 24661286.

It can be written as a sum of positive squares in 4 ways, for example, as 57320041 + 10896601 = 7571^2 + 3301^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44483 + ... + 45990.

Almost surely, 2^68216642 is an apocalyptic number.

68216642 is a deficient number, since it is larger than the sum of its proper divisors (45780598).

68216642 is a wasteful number, since it uses less digits than its factorization.

68216642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90517.

The product of its digits is 27648, while the sum is 35.

The square root of 68216642 is about 8259.3366561728. The cubic root of 68216642 is about 408.5985104502.

The spelling of 68216642 in words is "sixty-eight million, two hundred sixteen thousand, six hundred forty-two".