68256435447 has 6 divisors (see below), whose sum is σ = 98592628992. Its totient is φ = 45504290292.

The previous prime is 68256435439. The next prime is 68256435479. The reversal of 68256435447 is 74453465286.

68256435447 is a `hidden beast` number, since 6 + 8 + 2 + 56 + 43 + 544 + 7 = 666.

It is not a de Polignac number, because 68256435447 - 2³ = 68256435439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68256435393 and 68256435402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68256435547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3792024183 + ... + 3792024200.

It is an arithmetic number, because the mean of its divisors is an integer number (16432104832).

Almost surely, 2^68256435447 is an apocalyptic number.

68256435447 is a deficient number, since it is larger than the sum of its proper divisors (30336193545).

68256435447 is a wasteful number, since it uses less digits than its factorization.

68256435447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7584048389 (or 7584048386 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 54.

The spelling of 68256435447 in words is "sixty-eight billion, two hundred fifty-six million, four hundred thirty-five thousand, four hundred forty-seven".