68308680386 has 4 divisors (see below), whose sum is σ = 102463020582. Its totient is φ = 34154340192.

The previous prime is 68308680383. The next prime is 68308680403.

68308680386 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56587370161 + 11721310225 = 237881^2 + 108265^2 .

It is a super-2 number, since 2×68308680386² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68308680383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17077170095 + ... + 17077170098.

Almost surely, 2^68308680386 is an apocalyptic number.

68308680386 is a deficient number, since it is larger than the sum of its proper divisors (34154340196).

68308680386 is a wasteful number, since it uses less digits than its factorization.

68308680386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34154340195.

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 68308680386 in words is "sixty-eight billion, three hundred eight million, six hundred eighty thousand, three hundred eighty-six".