68242744885321 has 4 divisors (see below), whose sum is σ = 68242763156944. Its totient is φ = 68242726613700.

The previous prime is 68242744885291. The next prime is 68242744885349. The reversal of 68242744885321 is 12358844724286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68242744885321 - 2⁷ = 68242744885193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68242744883321) 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, 1284075 + ... + 11753056.

It is an arithmetic number, because the mean of its divisors is an integer number (17060690789236).

Almost surely, 2^{68242744885321} is an apocalyptic number.

It is an amenable number.

68242744885321 is a deficient number, since it is larger than the sum of its proper divisors (18271623).

68242744885321 is a wasteful number, since it uses less digits than its factorization.

68242744885321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18271622.

The product of its digits is 165150720, while the sum is 64.

The spelling of 68242744885321 in words is "sixty-eight trillion, two hundred forty-two billion, seven hundred forty-four million, eight hundred eighty-five thousand, three hundred twenty-one".