68143816 has 16 divisors (see below), whose sum is σ = 137598300. Its totient is φ = 31450944.

The previous prime is 68143813. The next prime is 68143897. The reversal of 68143816 is 61834186.

It can be written as a sum of positive squares in 2 ways, for example, as 54081316 + 14062500 = 7354^2 + 3750^2 .

It is not an unprimeable number, because it can be changed into a prime (68143813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327511 + ... + 327718.

Almost surely, 2^68143816 is an apocalyptic number.

It is an amenable number.

68143816 is an abundant number, since it is smaller than the sum of its proper divisors (69454484).

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

68143816 is a wasteful number, since it uses less digits than its factorization.

68143816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655248 (or 655244 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 68143816 is about 8254.9267713287. The cubic root of 68143816 is about 408.4530562540.

The spelling of 68143816 in words is "sixty-eight million, one hundred forty-three thousand, eight hundred sixteen".