68438647063 has 4 divisors (see below), whose sum is σ = 70798600440. Its totient is φ = 66078693688.

The previous prime is 68438647037. The next prime is 68438647087. The reversal of 68438647063 is 36074683486.

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 68438647063 - 2²⁵ = 68405092631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68438646995 and 68438647013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68438647033) 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, 1179976645 + ... + 1179976702.

It is an arithmetic number, because the mean of its divisors is an integer number (17699650110).

Almost surely, 2^68438647063 is an apocalyptic number.

68438647063 is a deficient number, since it is larger than the sum of its proper divisors (2359953377).

68438647063 is a wasteful number, since it uses less digits than its factorization.

68438647063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359953376.

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 68438647063 in words is "sixty-eight billion, four hundred thirty-eight million, six hundred forty-seven thousand, sixty-three".