68072840249 has 8 divisors (see below), whose sum is σ = 68181805728. Its totient is φ = 67963940800.

The previous prime is 68072840239. The next prime is 68072840327. The reversal of 68072840249 is 94204827086.

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 68072840249 - 2⁸ = 68072839993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68072840197 and 68072840206.

It is not an unprimeable number, because it can be changed into a prime (68072840239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301734 + ... + 2331120.

It is an arithmetic number, because the mean of its divisors is an integer number (8522725716).

Almost surely, 2^68072840249 is an apocalyptic number.

It is an amenable number.

68072840249 is a deficient number, since it is larger than the sum of its proper divisors (108965479).

68072840249 is a wasteful number, since it uses less digits than its factorization.

68072840249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33015.

The product of its (nonzero) digits is 1548288, while the sum is 50.

It can be divided in two parts, 6807284024 and 9, that multiplied together give a palindrome (61265556216).

The spelling of 68072840249 in words is "sixty-eight billion, seventy-two million, eight hundred forty thousand, two hundred forty-nine".