68677147249 has 8 divisors (see below), whose sum is σ = 68734348200. Its totient is φ = 68619974016.

The previous prime is 68677147241. The next prime is 68677147271. The reversal of 68677147249 is 94274177686.

It can be written as a sum of positive squares in 4 ways, for example, as 3928782400 + 64748364849 = 62680^2 + 254457^2 .

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 68677147249 - 2³ = 68677147241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68677147241) by changing a digit.

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, 9341427 + ... + 9348775.

It is an arithmetic number, because the mean of its divisors is an integer number (8591793525).

Almost surely, 2^68677147249 is an apocalyptic number.

It is an amenable number.

68677147249 is a deficient number, since it is larger than the sum of its proper divisors (57200951).

68677147249 is a wasteful number, since it uses less digits than its factorization.

68677147249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13859.

The product of its digits is 28449792, while the sum is 61.

The spelling of 68677147249 in words is "sixty-eight billion, six hundred seventy-seven million, one hundred forty-seven thousand, two hundred forty-nine".