68131812 has 48 divisors (see below), whose sum is σ = 184002560. Its totient is φ = 19217952.

The previous prime is 68131799. The next prime is 68131879. The reversal of 68131812 is 21813186.

It is a self number, because there is not a number n which added to its sum of digits gives 68131812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1503 + ... + 11769.

Almost surely, 2^68131812 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 68131812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92001280).

68131812 is an abundant number, since it is smaller than the sum of its proper divisors (115870748).

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

68131812 is a wasteful number, since it uses less digits than its factorization.

68131812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360 (or 10358 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 68131812 is about 8254.1996583557. The cubic root of 68131812 is about 408.4290709109.

Adding to 68131812 its reverse (21813186), we get a palindrome (89944998).

The spelling of 68131812 in words is "sixty-eight million, one hundred thirty-one thousand, eight hundred twelve".