68481816 has 64 divisors (see below), whose sum is σ = 186251520. Its totient is φ = 20856960.

The previous prime is 68481793. The next prime is 68481817. The reversal of 68481816 is 61818486.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68481817) 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 15 ways as a sum of consecutive naturals, for example, 31071 + ... + 33201.

It is an arithmetic number, because the mean of its divisors is an integer number (2910180).

Almost surely, 2^68481816 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 68481816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93125760).

68481816 is an abundant number, since it is smaller than the sum of its proper divisors (117769704).

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

68481816 is a wasteful number, since it uses less digits than its factorization.

68481816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256 (or 2252 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 68481816 is about 8275.3740700950. The cubic root of 68481816 is about 409.1272651505.

The spelling of 68481816 in words is "sixty-eight million, four hundred eighty-one thousand, eight hundred sixteen".