68235653287 has 8 divisors (see below), whose sum is σ = 73004496560. Its totient is φ = 63584559360.

The previous prime is 68235653279. The next prime is 68235653309. The reversal of 68235653287 is 78235653286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68235653287 - 2³ = 68235653279 is a prime.

It is a super-2 number, since 2×68235653287² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68235653207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29436138 + ... + 29438455.

It is an arithmetic number, because the mean of its divisors is an integer number (9125562070).

Almost surely, 2^68235653287 is an apocalyptic number.

68235653287 is a deficient number, since it is larger than the sum of its proper divisors (4768843273).

68235653287 is a wasteful number, since it uses less digits than its factorization.

68235653287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58874673.

The product of its digits is 14515200, while the sum is 55.

Subtracting 68235653287 from its reverse (78235653286), we obtain a palindrome (9999999999).

The spelling of 68235653287 in words is "sixty-eight billion, two hundred thirty-five million, six hundred fifty-three thousand, two hundred eighty-seven".