68086646268643 has 4 divisors (see below), whose sum is σ = 69535298316960. Its totient is φ = 66637994220328.

The previous prime is 68086646268637. The next prime is 68086646268647. The reversal of 68086646268643 is 34686264668086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68086646268643 - 2⁹ = 68086646268131 is a prime.

It is a super-2 number, since 2×68086646268643² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68086646268647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724326024088 + ... + 724326024181.

It is an arithmetic number, because the mean of its divisors is an integer number (17383824579240).

Almost surely, 2^{68086646268643} is an apocalyptic number.

68086646268643 is a deficient number, since it is larger than the sum of its proper divisors (1448652048317).

68086646268643 is a wasteful number, since it uses less digits than its factorization.

68086646268643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448652048316.

The product of its (nonzero) digits is 2293235712, while the sum is 73.

The spelling of 68086646268643 in words is "sixty-eight trillion, eighty-six billion, six hundred forty-six million, two hundred sixty-eight thousand, six hundred forty-three".