68644830785 has 8 divisors (see below), whose sum is σ = 82379780160. Its totient is φ = 54911875824.

The previous prime is 68644830769. The next prime is 68644830853. The reversal of 68644830785 is 58703844686.

It is a happy number.

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 68644830785 - 2⁴ = 68644830769 is a prime.

It is a super-2 number, since 2×68644830785² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421805 + ... + 561434.

It is an arithmetic number, because the mean of its divisors is an integer number (10297472520).

Almost surely, 2^68644830785 is an apocalyptic number.

It is an amenable number.

68644830785 is a deficient number, since it is larger than the sum of its proper divisors (13734949375).

68644830785 is a wasteful number, since it uses less digits than its factorization.

68644830785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997207.

The product of its (nonzero) digits is 30965760, while the sum is 59.

The spelling of 68644830785 in words is "sixty-eight billion, six hundred forty-four million, eight hundred thirty thousand, seven hundred eighty-five".