68831302251 has 4 divisors (see below), whose sum is σ = 91775069672. Its totient is φ = 45887534832.

The previous prime is 68831302247. The next prime is 68831302283. The reversal of 68831302251 is 15220313886.

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

It is not a de Polignac number, because 68831302251 - 2² = 68831302247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68831302051) 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, 11471883706 + ... + 11471883711.

It is an arithmetic number, because the mean of its divisors is an integer number (22943767418).

Almost surely, 2^68831302251 is an apocalyptic number.

68831302251 is a deficient number, since it is larger than the sum of its proper divisors (22943767421).

68831302251 is a wasteful number, since it uses less digits than its factorization.

68831302251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22943767420.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 68831302251 in words is "sixty-eight billion, eight hundred thirty-one million, three hundred two thousand, two hundred fifty-one".