68045253251 has 4 divisors (see below), whose sum is σ = 68052229872. Its totient is φ = 68038276632.

The previous prime is 68045253197. The next prime is 68045253271. The reversal of 68045253251 is 15235254086.

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 68045253251 - 2¹⁸ = 68044991107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68045253199 and 68045253208.

It is not an unprimeable number, because it can be changed into a prime (68045253271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3473660 + ... + 3493193.

It is an arithmetic number, because the mean of its divisors is an integer number (17013057468).

Almost surely, 2^68045253251 is an apocalyptic number.

68045253251 is a deficient number, since it is larger than the sum of its proper divisors (6976621).

68045253251 is an equidigital number, since it uses as much as digits as its factorization.

68045253251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6976620.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 68045253251 in words is "sixty-eight billion, forty-five million, two hundred fifty-three thousand, two hundred fifty-one".