68677643727 has 48 divisors (see below), whose sum is σ = 123706282752. Its totient is φ = 35668892160.

The previous prime is 68677643633. The next prime is 68677643729. The reversal of 68677643727 is 72734677686.

It is a happy number.

It is not a de Polignac number, because 68677643727 - 2¹⁹ = 68677119439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68677643729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4529503 + ... + 4544639.

It is an arithmetic number, because the mean of its divisors is an integer number (2577214224).

Almost surely, 2^68677643727 is an apocalyptic number.

68677643727 is a deficient number, since it is larger than the sum of its proper divisors (55028639025).

68677643727 is a wasteful number, since it uses less digits than its factorization.

68677643727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21708 (or 21705 counting only the distinct ones).

The product of its digits is 99574272, while the sum is 63.

The spelling of 68677643727 in words is "sixty-eight billion, six hundred seventy-seven million, six hundred forty-three thousand, seven hundred twenty-seven".