68305474314551 has 4 divisors (see below), whose sum is σ = 68371597717632. Its totient is φ = 68239350911472.

The previous prime is 68305474314547. The next prime is 68305474314563. The reversal of 68305474314551 is 15541347450386.

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 68305474314551 - 2² = 68305474314547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61305474314551) 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, 33061699991 + ... + 33061702056.

It is an arithmetic number, because the mean of its divisors is an integer number (17092899429408).

Almost surely, 2^{68305474314551} is an apocalyptic number.

68305474314551 is a deficient number, since it is larger than the sum of its proper divisors (66123403081).

68305474314551 is a wasteful number, since it uses less digits than its factorization.

68305474314551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66123403080.

The product of its (nonzero) digits is 24192000, while the sum is 56.

The spelling of 68305474314551 in words is "sixty-eight trillion, three hundred five billion, four hundred seventy-four million, three hundred fourteen thousand, five hundred fifty-one".