68719345665 has 32 divisors (see below), whose sum is σ = 111833671680. Its totient is φ = 36026837184.

The previous prime is 68719345637. The next prime is 68719345679. The reversal of 68719345665 is 56654391786.

It is not a de Polignac number, because 68719345665 - 2⁹ = 68719345153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68719345599 and 68719345608.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141262 + ... + 396728.

It is an arithmetic number, because the mean of its divisors is an integer number (3494802240).

Almost surely, 2^68719345665 is an apocalyptic number.

It is an amenable number.

68719345665 is a deficient number, since it is larger than the sum of its proper divisors (43114326015).

68719345665 is a wasteful number, since it uses less digits than its factorization.

68719345665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255781.

The product of its digits is 32659200, while the sum is 60.

The spelling of 68719345665 in words is "sixty-eight billion, seven hundred nineteen million, three hundred forty-five thousand, six hundred sixty-five".