68768235251 has 4 divisors (see below), whose sum is σ = 68816562912. Its totient is φ = 68719907592.

The previous prime is 68768235247. The next prime is 68768235281. The reversal of 68768235251 is 15253286786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68768235251 - 2² = 68768235247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68768235193 and 68768235202.

It is not an unprimeable number, because it can be changed into a prime (68768235241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24161696 + ... + 24164541.

It is an arithmetic number, because the mean of its divisors is an integer number (17204140728).

Almost surely, 2^68768235251 is an apocalyptic number.

68768235251 is a deficient number, since it is larger than the sum of its proper divisors (48327661).

68768235251 is a wasteful number, since it uses less digits than its factorization.

68768235251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48327660.

The product of its digits is 4838400, while the sum is 53.

The spelling of 68768235251 in words is "sixty-eight billion, seven hundred sixty-eight million, two hundred thirty-five thousand, two hundred fifty-one".