68517643725 has 72 divisors (see below), whose sum is σ = 132186385760. Its totient is φ = 33814247040.

The previous prime is 68517643723. The next prime is 68517643757. The reversal of 68517643725 is 52734671586.

68517643725 is a `hidden beast` number, since 68 + 517 + 6 + 43 + 7 + 25 = 666.

It is not a de Polignac number, because 68517643725 - 2¹ = 68517643723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68517643723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2542 + ... + 370191.

Almost surely, 2^68517643725 is an apocalyptic number.

It is an amenable number.

68517643725 is a deficient number, since it is larger than the sum of its proper divisors (63668742035).

68517643725 is a wasteful number, since it uses less digits than its factorization.

68517643725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372811 (or 372803 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 68517643725 in words is "sixty-eight billion, five hundred seventeen million, six hundred forty-three thousand, seven hundred twenty-five".