68228434657 has 16 divisors (see below), whose sum is σ = 70690258944. Its totient is φ = 65783250000.

The previous prime is 68228434621. The next prime is 68228434753. The reversal of 68228434657 is 75643482286.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68228434657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68228434598 and 68228434607.

It is not an unprimeable number, because it can be changed into a prime (68228434957) 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, 20985282 + ... + 20988532.

It is an arithmetic number, because the mean of its divisors is an integer number (4418141184).

Almost surely, 2^68228434657 is an apocalyptic number.

It is an amenable number.

68228434657 is a deficient number, since it is larger than the sum of its proper divisors (2461824287).

68228434657 is a wasteful number, since it uses less digits than its factorization.

68228434657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580.

The product of its digits is 15482880, while the sum is 55.

The spelling of 68228434657 in words is "sixty-eight billion, two hundred twenty-eight million, four hundred thirty-four thousand, six hundred fifty-seven".