68559745667 has 24 divisors (see below), whose sum is σ = 80195073840. Its totient is φ = 58440701760.

The previous prime is 68559745619. The next prime is 68559745687. The reversal of 68559745667 is 76654795586.

It is not a de Polignac number, because 68559745667 - 2¹² = 68559741571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68559745597 and 68559745606.

It is not an unprimeable number, because it can be changed into a prime (68559745687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7732817 + ... + 7741677.

It is an arithmetic number, because the mean of its divisors is an integer number (3341461410).

Almost surely, 2^68559745667 is an apocalyptic number.

68559745667 is a deficient number, since it is larger than the sum of its proper divisors (11635328173).

68559745667 is a wasteful number, since it uses less digits than its factorization.

68559745667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731 (or 9724 counting only the distinct ones).

The product of its digits is 381024000, while the sum is 68.

The spelling of 68559745667 in words is "sixty-eight billion, five hundred fifty-nine million, seven hundred forty-five thousand, six hundred sixty-seven".