68220851735 has 8 divisors (see below), whose sum is σ = 81942186816. Its totient is φ = 54525238240.

The previous prime is 68220851731. The next prime is 68220851737. The reversal of 68220851735 is 53715802286.

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

It is not a de Polignac number, because 68220851735 - 2² = 68220851731 is a prime.

It is a super-2 number, since 2×68220851735² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68220851735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68220851731) 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, 6424559 + ... + 6435168.

It is an arithmetic number, because the mean of its divisors is an integer number (10242773352).

Almost surely, 2^68220851735 is an apocalyptic number.

68220851735 is a deficient number, since it is larger than the sum of its proper divisors (13721335081).

68220851735 is a wasteful number, since it uses less digits than its factorization.

68220851735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12860793.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 68220851735 in words is "sixty-eight billion, two hundred twenty million, eight hundred fifty-one thousand, seven hundred thirty-five".