68721518707 has 8 divisors (see below), whose sum is σ = 68865855696. Its totient is φ = 68577257952.

The previous prime is 68721518693. The next prime is 68721518711. The reversal of 68721518707 is 70781512786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68721518707 - 2²⁷ = 68587300979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68721518807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2008848 + ... + 2042770.

It is an arithmetic number, because the mean of its divisors is an integer number (8608231962).

Almost surely, 2^68721518707 is an apocalyptic number.

68721518707 is a deficient number, since it is larger than the sum of its proper divisors (144336989).

68721518707 is a wasteful number, since it uses less digits than its factorization.

68721518707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38117.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 68721518707 in words is "sixty-eight billion, seven hundred twenty-one million, five hundred eighteen thousand, seven hundred seven".