68585640405 has 8 divisors (see below), whose sum is σ = 109737024672. Its totient is φ = 36579008208.

The previous prime is 68585640359. The next prime is 68585640419. The reversal of 68585640405 is 50404658586.

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

It is a de Polignac number, because none of the positive numbers 2^k-68585640405 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2286187999 + ... + 2286188028.

It is an arithmetic number, because the mean of its divisors is an integer number (13717128084).

Almost surely, 2^68585640405 is an apocalyptic number.

It is an amenable number.

68585640405 is a deficient number, since it is larger than the sum of its proper divisors (41151384267).

68585640405 is a wasteful number, since it uses less digits than its factorization.

68585640405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572376035.

The product of its (nonzero) digits is 4608000, while the sum is 51.

The spelling of 68585640405 in words is "sixty-eight billion, five hundred eighty-five million, six hundred forty thousand, four hundred five".