68253217381 has 8 divisors (see below), whose sum is σ = 72038114720. Its totient is φ = 64487582352.

The previous prime is 68253217367. The next prime is 68253217423. The reversal of 68253217381 is 18371235286.

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

It is a cyclic number.

It is not a de Polignac number, because 68253217381 - 2¹¹ = 68253215333 is a prime.

It is a super-2 number, since 2×68253217381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68253217481) 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, 4808295 + ... + 4822468.

It is an arithmetic number, because the mean of its divisors is an integer number (9004764340).

Almost surely, 2^68253217381 is an apocalyptic number.

It is an amenable number.

68253217381 is a deficient number, since it is larger than the sum of its proper divisors (3784897339).

68253217381 is a wasteful number, since it uses less digits than its factorization.

68253217381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9631155.

The product of its digits is 483840, while the sum is 46.

The spelling of 68253217381 in words is "sixty-eight billion, two hundred fifty-three million, two hundred seventeen thousand, three hundred eighty-one".