68242706251 has 8 divisors (see below), whose sum is σ = 70837632000. Its totient is φ = 65672377320.

The previous prime is 68242706249. The next prime is 68242706281. The reversal of 68242706251 is 15260724286.

It is a happy number.

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 68242706251 - 2¹ = 68242706249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68242706198 and 68242706207.

It is not an unprimeable number, because it can be changed into a prime (68242706281) 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, 6143551 + ... + 6154648.

It is an arithmetic number, because the mean of its divisors is an integer number (8854704000).

Almost surely, 2^68242706251 is an apocalyptic number.

68242706251 is a deficient number, since it is larger than the sum of its proper divisors (2594925749).

68242706251 is a wasteful number, since it uses less digits than its factorization.

68242706251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12298409.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 68242706251 in words is "sixty-eight billion, two hundred forty-two million, seven hundred six thousand, two hundred fifty-one".