68278378047 has 16 divisors (see below), whose sum is σ = 99447706368. Its totient is φ = 41325126080.

The previous prime is 68278378027. The next prime is 68278378073. The reversal of 68278378047 is 74087387286.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68278378047 - 2¹⁵ = 68278345279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68278378027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367838 + ... + 1416875.

It is an arithmetic number, because the mean of its divisors is an integer number (6215481648).

Almost surely, 2^68278378047 is an apocalyptic number.

68278378047 is a deficient number, since it is larger than the sum of its proper divisors (31169328321).

68278378047 is a wasteful number, since it uses less digits than its factorization.

68278378047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785470.

The product of its (nonzero) digits is 25288704, while the sum is 60.

The spelling of 68278378047 in words is "sixty-eight billion, two hundred seventy-eight million, three hundred seventy-eight thousand, forty-seven".