68247686517 has 4 divisors (see below), whose sum is σ = 90996915360. Its totient is φ = 45498457676.

The previous prime is 68247686501. The next prime is 68247686527. The reversal of 68247686517 is 71568674286.

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 68247686517 - 2⁴ = 68247686501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68247686527) 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, 11374614417 + ... + 11374614422.

It is an arithmetic number, because the mean of its divisors is an integer number (22749228840).

Almost surely, 2^68247686517 is an apocalyptic number.

It is an amenable number.

68247686517 is a deficient number, since it is larger than the sum of its proper divisors (22749228843).

68247686517 is a wasteful number, since it uses less digits than its factorization.

68247686517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22749228842.

The product of its digits is 27095040, while the sum is 60.

The spelling of 68247686517 in words is "sixty-eight billion, two hundred forty-seven million, six hundred eighty-six thousand, five hundred seventeen".