68086646268640 has 24 divisors (see below), whose sum is σ = 160854701810040. Its totient is φ = 27234658507392.

The previous prime is 68086646268637. The next prime is 68086646268647. The reversal of 68086646268640 is 4686264668086.

It is a super-2 number, since 2×68086646268640² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 68086646268640.

It is a congruent 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, 212770769430 + ... + 212770769749.

It is an arithmetic number, because the mean of its divisors is an integer number (6702279242085).

Almost surely, 2^{68086646268640} is an apocalyptic number.

It is an amenable number.

68086646268640 is an abundant number, since it is smaller than the sum of its proper divisors (92768055541400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68086646268640 is a wasteful number, since it uses less digits than its factorization.

68086646268640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425541539194 (or 425541539186 counting only the distinct ones).

The product of its (nonzero) digits is 764411904, while the sum is 70.

The spelling of 68086646268640 in words is "sixty-eight trillion, eighty-six billion, six hundred forty-six million, two hundred sixty-eight thousand, six hundred forty".