68548676681 has 4 divisors (see below), whose sum is σ = 71529053952. Its totient is φ = 65568299412.

The previous prime is 68548676639. The next prime is 68548676711. The reversal of 68548676681 is 18667684586.

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 a de Polignac number, because none of the positive numbers 2^k-68548676681 is a prime.

It is a super-2 number, since 2×68548676681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68548676611) 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, 1490188601 + ... + 1490188646.

It is an arithmetic number, because the mean of its divisors is an integer number (17882263488).

Almost surely, 2^68548676681 is an apocalyptic number.

It is an amenable number.

68548676681 is a deficient number, since it is larger than the sum of its proper divisors (2980377271).

68548676681 is a wasteful number, since it uses less digits than its factorization.

68548676681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980377270.

The product of its digits is 92897280, while the sum is 65.

The spelling of 68548676681 in words is "sixty-eight billion, five hundred forty-eight million, six hundred seventy-six thousand, six hundred eighty-one".