68655255687 has 24 divisors (see below), whose sum is σ = 104015960256. Its totient is φ = 43585615296.

The previous prime is 68655255629. The next prime is 68655255689. The reversal of 68655255687 is 78655255686.

68655255687 is a `hidden beast` number, since 6 + 8 + 65 + 5 + 2 + 5 + 568 + 7 = 666.

68655255687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 68655255687 - 2⁶ = 68655255623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68655255689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2177668 + ... + 2208969.

It is an arithmetic number, because the mean of its divisors is an integer number (4333998344).

Almost surely, 2^68655255687 is an apocalyptic number.

68655255687 is a deficient number, since it is larger than the sum of its proper divisors (35360704569).

68655255687 is a wasteful number, since it uses less digits than its factorization.

68655255687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386727 (or 4386724 counting only the distinct ones).

The product of its digits is 120960000, while the sum is 63.

Subtracting 68655255687 from its reverse (78655255686), we obtain a palindrome (9999999999).

The spelling of 68655255687 in words is "sixty-eight billion, six hundred fifty-five million, two hundred fifty-five thousand, six hundred eighty-seven".