68779586045 has 4 divisors (see below), whose sum is σ = 82535503260. Its totient is φ = 55023668832.

The previous prime is 68779586041. The next prime is 68779586077. The reversal of 68779586045 is 54068597786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13292014681 + 55487571364 = 115291^2 + 235558^2 .

It is a cyclic number.

It is not a de Polignac number, because 68779586045 - 2² = 68779586041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68779586041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6877958600 + ... + 6877958609.

It is an arithmetic number, because the mean of its divisors is an integer number (20633875815).

Almost surely, 2^68779586045 is an apocalyptic number.

It is an amenable number.

68779586045 is a deficient number, since it is larger than the sum of its proper divisors (13755917215).

68779586045 is a wasteful number, since it uses less digits than its factorization.

68779586045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13755917214.

The product of its (nonzero) digits is 101606400, while the sum is 65.

The spelling of 68779586045 in words is "sixty-eight billion, seven hundred seventy-nine million, five hundred eighty-six thousand, forty-five".