68349578417 has 4 divisors (see below), whose sum is σ = 68871331056. Its totient is φ = 67827825780.

The previous prime is 68349578393. The next prime is 68349578431. The reversal of 68349578417 is 71487594386.

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 not a de Polignac number, because 68349578417 - 2¹⁰ = 68349577393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68349578417.

It is not an unprimeable number, because it can be changed into a prime (68349878417) 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 3 ways as a sum of consecutive naturals, for example, 260876123 + ... + 260876384.

It is an arithmetic number, because the mean of its divisors is an integer number (17217832764).

Almost surely, 2^68349578417 is an apocalyptic number.

It is an amenable number.

68349578417 is a deficient number, since it is larger than the sum of its proper divisors (521752639).

68349578417 is a wasteful number, since it uses less digits than its factorization.

68349578417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521752638.

The product of its digits is 40642560, while the sum is 62.

The spelling of 68349578417 in words is "sixty-eight billion, three hundred forty-nine million, five hundred seventy-eight thousand, four hundred seventeen".