68253681 has 8 divisors (see below), whose sum is σ = 95794720. Its totient is φ = 43107552.

The previous prime is 68253667. The next prime is 68253701. The reversal of 68253681 is 18635286.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68253681 - 2¹¹ = 68251633 is a prime.

It is a super-2 number, since 2×68253681² = 9317129940099522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68253781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598660 + ... + 598773.

It is an arithmetic number, because the mean of its divisors is an integer number (11974340).

Almost surely, 2^68253681 is an apocalyptic number.

It is an amenable number.

68253681 is a deficient number, since it is larger than the sum of its proper divisors (27541039).

68253681 is a wasteful number, since it uses less digits than its factorization.

68253681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197455.

The product of its digits is 69120, while the sum is 39.

The square root of 68253681 is about 8261.5786021801. The cubic root of 68253681 is about 408.6724481362.

The spelling of 68253681 in words is "sixty-eight million, two hundred fifty-three thousand, six hundred eighty-one".