68648084687 has 16 divisors (see below), whose sum is σ = 84961981440. Its totient is φ = 54011519712.

The previous prime is 68648084639. The next prime is 68648084719. The reversal of 68648084687 is 78648084686.

It is a cyclic number.

It is not a de Polignac number, because 68648084687 - 2⁸ = 68648084431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68648084287) 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, 2090903 + ... + 2123480.

It is an arithmetic number, because the mean of its divisors is an integer number (5310123840).

Almost surely, 2^68648084687 is an apocalyptic number.

68648084687 is a deficient number, since it is larger than the sum of its proper divisors (16313896753).

68648084687 is a wasteful number, since it uses less digits than its factorization.

68648084687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214582.

The product of its (nonzero) digits is 99090432, while the sum is 65.

Subtracting 68648084687 from its reverse (78648084686), we obtain a palindrome (9999999999).

The spelling of 68648084687 in words is "sixty-eight billion, six hundred forty-eight million, eighty-four thousand, six hundred eighty-seven".