68726505347 has 4 divisors (see below), whose sum is σ = 68727036456. Its totient is φ = 68725974240.

The previous prime is 68726505343. The next prime is 68726505359. The reversal of 68726505347 is 74350562786.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68726505347 - 2² = 68726505343 is a prime.

It is a super-2 number, since 2×68726505347² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68726505343) 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, 69272 + ... + 377162.

It is an arithmetic number, because the mean of its divisors is an integer number (17181759114).

Almost surely, 2^68726505347 is an apocalyptic number.

68726505347 is a deficient number, since it is larger than the sum of its proper divisors (531109).

68726505347 is a wasteful number, since it uses less digits than its factorization.

68726505347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531108.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 68726505347 in words is "sixty-eight billion, seven hundred twenty-six million, five hundred five thousand, three hundred forty-seven".