68318481 has 16 divisors (see below), whose sum is σ = 113568768. Its totient is φ = 35490000.

The previous prime is 68318473. The next prime is 68318483. The reversal of 68318481 is 18481386.

It is not a de Polignac number, because 68318481 - 2³ = 68318473 is a prime.

It is a super-2 number, since 2×68318481² = 9334829692294722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68318483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147645 + ... + 148106.

It is an arithmetic number, because the mean of its divisors is an integer number (7098048).

Almost surely, 2^68318481 is an apocalyptic number.

It is an amenable number.

68318481 is a deficient number, since it is larger than the sum of its proper divisors (45250287).

68318481 is a wasteful number, since it uses less digits than its factorization.

68318481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295772.

The product of its digits is 36864, while the sum is 39.

The square root of 68318481 is about 8265.4994404452. The cubic root of 68318481 is about 408.8017383470.

The spelling of 68318481 in words is "sixty-eight million, three hundred eighteen thousand, four hundred eighty-one".