68159712447 has 12 divisors (see below), whose sum is σ = 99922365400. Its totient is φ = 44761601808.

The previous prime is 68159712407. The next prime is 68159712461. The reversal of 68159712447 is 74421795186.

68159712447 is a `hidden beast` number, since 6 + 8 + 1 + 597 + 1 + 2 + 4 + 47 = 666.

It is not a de Polignac number, because 68159712447 - 2¹⁶ = 68159646911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68159712393 and 68159712402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68159712407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56516572 + ... + 56517777.

Almost surely, 2^68159712447 is an apocalyptic number.

68159712447 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

68159712447 is a deficient number, since it is larger than the sum of its proper divisors (31762652953).

68159712447 is a wasteful number, since it uses less digits than its factorization.

68159712447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113034422 (or 113034419 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 68159712447 in words is "sixty-eight billion, one hundred fifty-nine million, seven hundred twelve thousand, four hundred forty-seven".